Apple calendar runs both the macOS and iOS mobile operating systems. Offering online cloud backup of calendars using Apple’s iCloud service, it can sync with Google Calendar and Microsoft Exchange Server. Users can schedule events in their day that include time, location, duration, and extra notes.

Google Meet is Google's web-based video conferencing platform, designed to compete with major conferencing platforms.

Easily generate a QR code for your links to print, share, or embed.

Caldav is a protocol that allows different clients/servers to access scheduling information on remote servers as well as schedule meetings with other users on the same server or other servers. It extends WebDAV specification and uses iCalendar format for the data.

Cal Video is the in-house web-based video conferencing platform powered by Daily.co, which is minimalistic and lightweight, but has most of the features you need.

Jitsi is a free open-source video conferencing software for web and mobile. Make a call, launch on your own servers, integrate into your app, and more.

Your Bitcoin & Nostr companion for the web. Use Alby to charge Satoshi for your [Cal.com](https://cal.com) meetings.

The joyful productivity app

Attio is the AI-native CRM that builds, scales and grows your company to the next level.

You simply paste a [Cal.com](https://cal.com) link of someone, select a frequency and we will take care of the scheduling for you.

Request a signed Business Associate Agreement for your HIPAA compliance records

Basecamp puts everything you need to get work done in one place. It’s the calm, organized way to manage projects, work with clients, and communicate company-wide.

24x7 AI receptionists to answer all inbound calls

BTCPay Server is a self-hosted open source Bitcoin payment processor. Start receiving bitcoin payments for your events and bookings.

Feel connected with your remote team. Team events, new hire onboardings, coffee chats, all on Campfire. No more awkward Zoom calls.

Add [Cal.com](https://cal.com/) to your Chatbase AI Chatbot and accept bookings right inside chat.

Create, List and Interact with Your Cal.com links and connections easily.

Close is the inside sales CRM of choice for startups and SMBs. Make more calls, send more emails and close more deals starting today.

All of your commitments, now in one place.

Integrate Deel with your Calendar and get automatic updates on key employee dates like PTO, start days, public holidays, and birthdays. No manual entry. No errors. Just a calendar that's always in sync with your team.

Run Professional Video Meetings, Coach Sales Teams in Real-Time with AI, And Schedule Meetings on Auto-Pilot. 100% GDPR Compliant, Enterprise Ready.

A new way to meet, with built-in Ai

Copy your server invite link and start scheduling calls in Discord! Discord is a VoIP and instant messaging social platform. Users have the ability to communicate with voice calls, video calls, text messaging, media and files in private chats or as part of communities.

Dub is the modern link attribution platform for you to create short links, track conversion analytics, and run affiliate programs.

The best video conferencing solution for businesses of any size. Fully secure, reliable, packed with features and ridiculously simple to use.

Element is an open-source communication platform that provides messaging, voice calling, and video conferencing capabilities. It is based on the Matrix protocol, which is a decentralized and federated messaging protocol designed to enable secure and interoperable communication across different platforms and services."

Create the most realistic speech with our AI audio platform

For calendars hosted on on-premises Microsoft Exchange 2013 servers

For calendars hosted on on-premises Microsoft Exchange 2016 servers

Fetch Microsoft Exchange calendars and availabilities using Exchange Web Services (EWS).

Facetime makes it super simple for collaborating teams to jump on a video call.

Fathom Analytics provides simple, privacy-focused website analytics. We're a GDPR-compliant, Google Analytics alternative.

Feishu Calendar is a time management and scheduling service developed by Feishu. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Feishu account on both mobile and web versions.

Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, currently as a platform inside the Google Marketing Platform brand.

GIPHY is your top source for the best & newest GIFs & Animated Stickers online. Find everything from funny GIFs, reaction GIFs, unique GIFs and more.

Google Calendar is a time management and scheduling service developed by Google. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Gmail account on both mobile and web versions.

The AI notepad for people in back-to-back meetings for MacOS

Connect [Cal.com](https://cal.com/) to [Greetmate.ai](https://www.greetmate.ai/) and enable appointment scheduling for your AI agents.

App to install Google Tag Manager

HitPay's [Cal.com](https://cal.com) payment integration combines powerful scheduling with seamless local payment acceptance. Our online scheduling software integration is built for customers in APAC, supporting their favorite e-wallets and banking apps.<p>Accept a wide range of local payments including:</p><span><strong data-stringify-type="bold">Real-time QR Code Payments:&nbsp;</strong>e.g. PayNow, DuitNow, QRIS, PromptPay</span><br/><span><strong data-stringify-type="bold">E-Wallets:&nbsp;</strong>e.g. GrabPay, ShopeePay, GCash, AliPay, WeChat Pay</span><br/><span><strong data-stringify-type="bold">Credit &amp; Debit Cards:&nbsp;</strong>e.g. Visa, Mastercard, American Express, UnionPay</span><br/><span><strong data-stringify-type="bold">Buy Now, Pay Later:&nbsp;</strong>e.g. PayLater by Grab, SPayLater, Atome</span><br/><p>About HitPay</p><span>HitPay is a full-stack payments infrastructure platform designed for growing businesses in APAC. We unify e-commerce, point of sale, and B2B payments into a single platform. HitPay is regulated in 6 APAC jurisdictions and backed by leading global investors, including Tiger Global, Y Combinator, Global Founders Capital, and HOF Capital.</span><br/><p>Learn more at&nbsp;<a class="c-link" href="https://hitpayapp.com/cal.com" target="_blank" rel="noopener noreferrer" data-stringify-link="https://hitpayapp.com/cal.com" data-sk="tooltip_parent">https://hitpayapp.com/cal.com</a></p>

Workrooms is an immersive virtual space, where you and your team can work better together, from anywhere

HubSpot is a cloud-based CRM designed to help align sales and marketing teams, foster sales enablement, boost ROI and optimize your inbound marketing strategy to generate more, qualified leads.

Huddle01 is a new video conferencing software native to Web3 and is comparable to a decentralized version of Zoom. It supports conversations for NFT communities, DAOs, Builders and also has features such as token gating, NFTs as avatars, Web3 Login + ENS and recording over IPFS.

Import events from an ICS Feed into [Cal.com](https://cal.com).

Insihts is an all-in-one platform for businesses looking to track user behavior, optimize workflows, and make data-driven decisions. Whether you are a marketer, product manager, or part of a customer success team, Insihts provides the tools you need to succeed.

Enhance your scheduling and appointment management experience with the Intercom Integration for [Cal.com](https://cal.com).

Jelly is a camera-free voice chat platform. No frills, no makeup needed, just good talking. Our AI magic handles the rest by highlighting and publishing key moments with rich visuals.

Lark Calendar is a time management and scheduling service developed by Lark. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Lark account on both mobile and web versions.

Build AI agents in minutes to automate workflows, save time and grow your business

Linear is a better way to build products. Connect your calendar to automate your status

Google Analytics alternative that protects your data and your customers' privacy

Add Meta Pixel to your bookings page to measure, optimize and build audiences for your ad campaigns.

Build next-gen voice agents with 500ms latency

Peer to peer real-time video conferences, optimized for small groups. Unlimited time, unlimited rooms each having 5-8 participants.

The mock payment app for tests

Crafting your personalized AI-driven assistant is easy and fast.

Automate without limits. The workflow automation platform that doesn't box you in, that you never outgrow

Nextcloud Talk is a fully self hosted, on-premises audio/video and chat communication service. It features web and mobile apps and is designed to offer the highest degree of security while being easy to use.

Microsoft Office 365 is a suite of apps that helps you stay connected with others and get things done. It includes but is not limited to Microsoft Word, PowerPoint, Excel, Teams, OneNote and OneDrive. Office 365 allows you to work remotely with others on a team and collaborate in an online environment. Both web versions and desktop/mobile applications are available.

Microsoft Teams is a business communication platform and collaborative workspace included in Microsoft 365. It offers workspace chat and video conferencing, file storage, and application integration. Both web versions and desktop/mobile applications are available. NOTE: MUST HAVE A WORK / SCHOOL ACCOUNT

Paypal payment app by [Cal.com](https://cal.com)

Ping.gg makes high quality video collaborations easier than ever. Think 'Zoom for streamers and creators'. Join a call in 3 clicks, manage audio and video like a pro, and copy-paste your guests straight into OBS

Connect APIs, remarkably fast. Stop writing boilerplate code, struggling with authentication and managing infrastructure. Start connecting APIs with code-level control when you need it — and no code when you don't

Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth. Today, Pipedrive is used by revenue teams at more than 100,000 companies worldwide. Pipedrive is headquartered in New York and has offices across Europe and the US. The company is backed by majority holder Vista Equity Partners, Bessemer Venture Partners, Insight Partners, Atomico, and DTCP. Learn more at www.pipedrive.com.

Simple, privacy-friendly Google Analytics alternative.

PostHog is the all-in-one platform for building better products - with product analytics, feature flags, session recordings, a/b testing, heatmaps, and more.

Quickly share your [Cal.com](https://cal.com) meeting links with Raycast

Supercharge your Call Operations with AI

Your online recording studio. The easiest way to record podcasts and videos in studio quality from anywhere. All from the browser.

Roam is Your Whole Company in one HQ

Salesforce (Sales Cloud) is a cloud-based application designed to help your salespeople sell smarter and faster by centralizing customer information, logging their interactions with your company, and automating many of the tasks salespeople do every day.

Unlock real-time AI and take your sales game to the next level

SendGrid delivers your transactional and marketing emails through the world's largest cloud-based email delivery platform.

The #1 Expert ADHD Coach. Weekly calls and in-app support so that you can reach your full potential

Schedule a chat with your guests or have a Signal Video call.

Video meetings made for music. Create your own virtual music classroom, easily.

Umami makes it easy to collect, analyze, and understand your web data — while maintaining visitor privacy and data ownership.

The world's fastest calendar, beautifully designed for a remote world

Connect your health data or wearables to trigger actions on your calendar.

Get the local weather forecast with icons in your calendar

Create meetings with Cisco Webex

Schedule a chat with your guests or have a WhatsApp Video call.

Whereby makes it super simple for collaborating teams to jump on a video call.

Wipe My Cal is a Cal.com exclusive app that redefines what it looks like to reschedule multiple meetings at the same time. Simply install the app, and select ‘Wipe’ for whatever date you need to mass reschedule. Handle emergencies, unexpected sick days and last minute events with the simple click of a button.

Embedded booking pages right into your wordpress page

Workflow automation for everyone. Use the Cal.com Zapier app to trigger your workflows when a booking is created, rescheduled, or cancelled, or after a meeting ends.

Bigin easily transforms your day-to-day customer processes into actionable pipelines. From qualifying leads to closing deals to managing important after-sales operations—Bigin connects your different teams to work together so that you can offer the best possible experience to your customers. Say goodbye to missing follow-ups, manual data entry, lack of team communication, and information silos.

Zoho Calendar is an online business calendar that makes scheduling easy for you. You can use it to stay on top of your schedule and also share calendars with your team to keep everyone on the same page.

Zoho CRM is a cloud-based application designed to help your salespeople sell smarter and faster by centralizing customer information, logging their interactions with your company, and automating many of the tasks salespeople do every day

Zoom is a secure and reliable video platform that supports all of your online communication needs. It can provide everything from one on one meetings, chat, phone, webinars, and large-scale online events. Available with both desktop, web, and mobile versions.

From tasks and workflows to apps and systems, build and automate anything in one powerful visual platform.

It would allow a booker to connect with the right person or choose the right event, faster. It would work by taking inputs from the booker and using that data to route to the correct booker/event as configured by Cal user

Skype is for connecting with the people that matter most in your life and work. It's built for both one-on-one and group conversations and works wherever you are – via mobile, PC and Alexa. Skype messaging and HD voice and video calling will help you share experiences and get things done with others.

A Saas company a payment processing software, and application programming interfaces for e-commerce websites and mobile applications.

Free Audio and Video Conferencing, Online Collaboration, Screen Sharing on web browser, mobile and desktop.

Effortless Human-Like AI Phone Calls and Scheduling

Tandem is a new virtual office space that allows teams to effortlessly connect as though they are in a physical office, online. Through co-working rooms, available statuses, live real-time video call, and chat options, you can see who’s around, talk and collaborate in one click. It works cross-platform with both desktop and mobile versions.

Schedule a chat with your guests or have a Telegram Video call.

telli AI agents reach your customers, make calls independently & enhance your customer experience - fully integrated into [Cal.com](https://cal.com).

Twipla.com, formerly known as Visitor Analytics, is a website intelligence platform that helps you understand how visitors interact with your website.

Zoom is a secure and reliable video platform that supports all of your online communication needs. It can provide everything from one on one meetings, chat, phone, webinars, and large-scale online events. Available with both desktop, web, and mobile versions.

Zoho CRM is a cloud-based application designed to help your salespeople sell smarter and faster by centralizing customer information, logging their interactions with your company, and automating many of the tasks salespeople do every day

Zoho Calendar is an online business calendar that makes scheduling easy for you. You can use it to stay on top of your schedule and also share calendars with your team to keep everyone on the same page.

Bigin easily transforms your day-to-day customer processes into actionable pipelines. From qualifying leads to closing deals to managing important after-sales operations—Bigin connects your different teams to work together so that you can offer the best possible experience to your customers. Say goodbye to missing follow-ups, manual data entry, lack of team communication, and information silos.

Workflow automation for everyone. Use the Cal.com Zapier app to trigger your workflows when a booking is created, rescheduled, or cancelled, or after a meeting ends.

Embedded booking pages right into your wordpress page

Whereby makes it super simple for collaborating teams to jump on a video call.

Schedule a chat with your guests or have a WhatsApp Video call.

Create meetings with Cisco Webex

Get the local weather forecast with icons in your calendar

Connect your health data or wearables to trigger actions on your calendar.

The world's fastest calendar, beautifully designed for a remote world

Umami makes it easy to collect, analyze, and understand your web data — while maintaining visitor privacy and data ownership.

Twipla.com, formerly known as Visitor Analytics, is a website intelligence platform that helps you understand how visitors interact with your website.

telli AI agents reach your customers, make calls independently & enhance your customer experience - fully integrated into [Cal.com](https://cal.com).

Schedule a chat with your guests or have a Telegram Video call.

Tandem is a new virtual office space that allows teams to effortlessly connect as though they are in a physical office, online. Through co-working rooms, available statuses, live real-time video call, and chat options, you can see who’s around, talk and collaborate in one click. It works cross-platform with both desktop and mobile versions.

Effortless Human-Like AI Phone Calls and Scheduling

Free Audio and Video Conferencing, Online Collaboration, Screen Sharing on web browser, mobile and desktop.

A Saas company a payment processing software, and application programming interfaces for e-commerce websites and mobile applications.

Skype is for connecting with the people that matter most in your life and work. It's built for both one-on-one and group conversations and works wherever you are – via mobile, PC and Alexa. Skype messaging and HD voice and video calling will help you share experiences and get things done with others.

Video meetings made for music. Create your own virtual music classroom, easily.

Schedule a chat with your guests or have a Signal Video call.

The #1 Expert ADHD Coach. Weekly calls and in-app support so that you can reach your full potential

SendGrid delivers your transactional and marketing emails through the world's largest cloud-based email delivery platform.

Unlock real-time AI and take your sales game to the next level

Salesforce (Sales Cloud) is a cloud-based application designed to help your salespeople sell smarter and faster by centralizing customer information, logging their interactions with your company, and automating many of the tasks salespeople do every day.

It would allow a booker to connect with the right person or choose the right event, faster. It would work by taking inputs from the booker and using that data to route to the correct booker/event as configured by Cal user

Roam is Your Whole Company in one HQ

Your online recording studio. The easiest way to record podcasts and videos in studio quality from anywhere. All from the browser.

Supercharge your Call Operations with AI

Quickly share your [Cal.com](https://cal.com) meeting links with Raycast

Easily generate a QR code for your links to print, share, or embed.

PostHog is the all-in-one platform for building better products - with product analytics, feature flags, session recordings, a/b testing, heatmaps, and more.

Simple, privacy-friendly Google Analytics alternative.

Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth. Today, Pipedrive is used by revenue teams at more than 100,000 companies worldwide. Pipedrive is headquartered in New York and has offices across Europe and the US. The company is backed by majority holder Vista Equity Partners, Bessemer Venture Partners, Insight Partners, Atomico, and DTCP. Learn more at www.pipedrive.com.

Connect APIs, remarkably fast. Stop writing boilerplate code, struggling with authentication and managing infrastructure. Start connecting APIs with code-level control when you need it — and no code when you don't

Ping.gg makes high quality video collaborations easier than ever. Think 'Zoom for streamers and creators'. Join a call in 3 clicks, manage audio and video like a pro, and copy-paste your guests straight into OBS

Paypal payment app by [Cal.com](https://cal.com)

Microsoft Teams is a business communication platform and collaborative workspace included in Microsoft 365. It offers workspace chat and video conferencing, file storage, and application integration. Both web versions and desktop/mobile applications are available. NOTE: MUST HAVE A WORK / SCHOOL ACCOUNT

Microsoft Office 365 is a suite of apps that helps you stay connected with others and get things done. It includes but is not limited to Microsoft Word, PowerPoint, Excel, Teams, OneNote and OneDrive. Office 365 allows you to work remotely with others on a team and collaborate in an online environment. Both web versions and desktop/mobile applications are available.

Nextcloud Talk is a fully self hosted, on-premises audio/video and chat communication service. It features web and mobile apps and is designed to offer the highest degree of security while being easy to use.

Automate without limits. The workflow automation platform that doesn't box you in, that you never outgrow

Crafting your personalized AI-driven assistant is easy and fast.

The mock payment app for tests

Peer to peer real-time video conferences, optimized for small groups. Unlimited time, unlimited rooms each having 5-8 participants.

Build next-gen voice agents with 500ms latency

Add Meta Pixel to your bookings page to measure, optimize and build audiences for your ad campaigns.

Google Analytics alternative that protects your data and your customers' privacy

Linear is a better way to build products. Connect your calendar to automate your status

Build AI agents in minutes to automate workflows, save time and grow your business

Lark Calendar is a time management and scheduling service developed by Lark. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Lark account on both mobile and web versions.

Jelly is a camera-free voice chat platform. No frills, no makeup needed, just good talking. Our AI magic handles the rest by highlighting and publishing key moments with rich visuals.

Enhance your scheduling and appointment management experience with the Intercom Integration for [Cal.com](https://cal.com).

Insihts is an all-in-one platform for businesses looking to track user behavior, optimize workflows, and make data-driven decisions. Whether you are a marketer, product manager, or part of a customer success team, Insihts provides the tools you need to succeed.

Import events from an ICS Feed into [Cal.com](https://cal.com).

Huddle01 is a new video conferencing software native to Web3 and is comparable to a decentralized version of Zoom. It supports conversations for NFT communities, DAOs, Builders and also has features such as token gating, NFTs as avatars, Web3 Login + ENS and recording over IPFS.

HubSpot is a cloud-based CRM designed to help align sales and marketing teams, foster sales enablement, boost ROI and optimize your inbound marketing strategy to generate more, qualified leads.

Workrooms is an immersive virtual space, where you and your team can work better together, from anywhere

HitPay's [Cal.com](https://cal.com) payment integration combines powerful scheduling with seamless local payment acceptance. Our online scheduling software integration is built for customers in APAC, supporting their favorite e-wallets and banking apps.<p>Accept a wide range of local payments including:</p><span><strong data-stringify-type="bold">Real-time QR Code Payments:&nbsp;</strong>e.g. PayNow, DuitNow, QRIS, PromptPay</span><br/><span><strong data-stringify-type="bold">E-Wallets:&nbsp;</strong>e.g. GrabPay, ShopeePay, GCash, AliPay, WeChat Pay</span><br/><span><strong data-stringify-type="bold">Credit &amp; Debit Cards:&nbsp;</strong>e.g. Visa, Mastercard, American Express, UnionPay</span><br/><span><strong data-stringify-type="bold">Buy Now, Pay Later:&nbsp;</strong>e.g. PayLater by Grab, SPayLater, Atome</span><br/><p>About HitPay</p><span>HitPay is a full-stack payments infrastructure platform designed for growing businesses in APAC. We unify e-commerce, point of sale, and B2B payments into a single platform. HitPay is regulated in 6 APAC jurisdictions and backed by leading global investors, including Tiger Global, Y Combinator, Global Founders Capital, and HOF Capital.</span><br/><p>Learn more at&nbsp;<a class="c-link" href="https://hitpayapp.com/cal.com" target="_blank" rel="noopener noreferrer" data-stringify-link="https://hitpayapp.com/cal.com" data-sk="tooltip_parent">https://hitpayapp.com/cal.com</a></p>

App to install Google Tag Manager

Connect [Cal.com](https://cal.com/) to [Greetmate.ai](https://www.greetmate.ai/) and enable appointment scheduling for your AI agents.

The AI notepad for people in back-to-back meetings for MacOS

Google Meet is Google's web-based video conferencing platform, designed to compete with major conferencing platforms.

Google Calendar is a time management and scheduling service developed by Google. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Gmail account on both mobile and web versions.

GIPHY is your top source for the best & newest GIFs & Animated Stickers online. Find everything from funny GIFs, reaction GIFs, unique GIFs and more.

Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, currently as a platform inside the Google Marketing Platform brand.

Feishu Calendar is a time management and scheduling service developed by Feishu. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Feishu account on both mobile and web versions.

Fathom Analytics provides simple, privacy-focused website analytics. We're a GDPR-compliant, Google Analytics alternative.

Facetime makes it super simple for collaborating teams to jump on a video call.

Fetch Microsoft Exchange calendars and availabilities using Exchange Web Services (EWS).

For calendars hosted on on-premises Microsoft Exchange 2016 servers

For calendars hosted on on-premises Microsoft Exchange 2013 servers

Create the most realistic speech with our AI audio platform

Element is an open-source communication platform that provides messaging, voice calling, and video conferencing capabilities. It is based on the Matrix protocol, which is a decentralized and federated messaging protocol designed to enable secure and interoperable communication across different platforms and services."

The best video conferencing solution for businesses of any size. Fully secure, reliable, packed with features and ridiculously simple to use.

Dub is the modern link attribution platform for you to create short links, track conversion analytics, and run affiliate programs.

Copy your server invite link and start scheduling calls in Discord! Discord is a VoIP and instant messaging social platform. Users have the ability to communicate with voice calls, video calls, text messaging, media and files in private chats or as part of communities.

A new way to meet, with built-in Ai

Run Professional Video Meetings, Coach Sales Teams in Real-Time with AI, And Schedule Meetings on Auto-Pilot. 100% GDPR Compliant, Enterprise Ready.

Integrate Deel with your Calendar and get automatic updates on key employee dates like PTO, start days, public holidays, and birthdays. No manual entry. No errors. Just a calendar that's always in sync with your team.

All of your commitments, now in one place.

Close is the inside sales CRM of choice for startups and SMBs. Make more calls, send more emails and close more deals starting today.

Create, List and Interact with Your Cal.com links and connections easily.

Add [Cal.com](https://cal.com/) to your Chatbase AI Chatbot and accept bookings right inside chat.

Feel connected with your remote team. Team events, new hire onboardings, coffee chats, all on Campfire. No more awkward Zoom calls.

BTCPay Server is a self-hosted open source Bitcoin payment processor. Start receiving bitcoin payments for your events and bookings.

24x7 AI receptionists to answer all inbound calls

Basecamp puts everything you need to get work done in one place. It’s the calm, organized way to manage projects, work with clients, and communicate company-wide.

Request a signed Business Associate Agreement for your HIPAA compliance records

You simply paste a [Cal.com](https://cal.com) link of someone, select a frequency and we will take care of the scheduling for you.

Attio is the AI-native CRM that builds, scales and grows your company to the next level.

The joyful productivity app

Your Bitcoin & Nostr companion for the web. Use Alby to charge Satoshi for your [Cal.com](https://cal.com) meetings.

From tasks and workflows to apps and systems, build and automate anything in one powerful visual platform.

Wipe My Cal is a Cal.com exclusive app that redefines what it looks like to reschedule multiple meetings at the same time. Simply install the app, and select ‘Wipe’ for whatever date you need to mass reschedule. Handle emergencies, unexpected sick days and last minute events with the simple click of a button.

Jitsi is a free open-source video conferencing software for web and mobile. Make a call, launch on your own servers, integrate into your app, and more.

Caldav is a protocol that allows different clients/servers to access scheduling information on remote servers as well as schedule meetings with other users on the same server or other servers. It extends WebDAV specification and uses iCalendar format for the data.

Apple calendar runs both the macOS and iOS mobile operating systems. Offering online cloud backup of calendars using Apple’s iCloud service, it can sync with Google Calendar and Microsoft Exchange Server. Users can schedule events in their day that include time, location, duration, and extra notes.

Cal Video is the in-house web-based video conferencing platform powered by Daily.co, which is minimalistic and lightweight, but has most of the features you need.