Browse Open Source Collaboration & Communication Tools projects
Discover top topics to find your best Open Source software options.
Raven
Simple, open source team messaging platform
Alternative to: 
Discord
Discord
Rocket.Chat
The communications platform that puts data protection first.
Alternative to: 
Skype
Skype
Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Alternative to: Discord
Discord