Communication and Collaboration

AFFiNE is an open-source, all-in-one workspace and an operating system for all the building blocks that assemble your knowledge base and much more -- wiki, knowledge management, presentation and digital assets

An internet archiving solution so you can save what you want to save.

BigBlueButton is an open source web conferencing system for online learning, provided together with the meeting room app, Greenlight.

Manage documentation, organize content, and collaborate seamlessly using BookStack’s web interface.

Discourse is the next-generation community forum platform.

EGroupware is a robust collaboration platform that streamlines project management and enhances team communication in a secure environment.

Etherpad is a real-time collaborative editor scalable to thousands of simultaneous real time users.

Jitsi is a fully encrypted, 100% open source video conferencing solution.

Mastodon is free and open-source software for running self-hosted social networking services.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.