Citadel - Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more. (Source Code) GPL-3.0C/Docker/Shell
Cozy Cloud - Personal cloud where you can manage and sync your contact, files and calendars, and manage your budget with an app store full of community contributions. (Source Code) GPL-3.0Nodejs
Digipad - An online self-hosted application for creating collaborative digital notepads (Documentation in french). (Source Code) AGPL-3.0Nodejs
Digistorm - Create collaborative surveys, quizzes, brainstorms, and word clouds (documentation in French). (Demo, Source Code) AGPL-3.0Nodejs
Digiwall - Create multimedia collaborative walls for in-person or remote work (documentation in French). (Source Code) AGPL-3.0Nodejs
egroupware - Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS. (Source Code) GPL-2.0PHP
Group Office - Enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients. (Source Code) AGPL-3.0PHP
Openmeetings - Video conferencing, instant messaging, whiteboard, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming. (Source Code) Apache-2.0Java
SOGo - SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface. (Demo, Source Code) LGPL-2.1Objective-C
Tine - Software for digital collaboration in companies and organizations. From powerful groupware functionalities to clever add-ons, tine combines everything to make daily team collaboration easier. (Source Code) AGPL-3.0Docker
Tracim - Collaborative Platform for team collaboration: file,threads,notes,agenda,etc. AGPL-3.0/LGPL-3.0/MITPython
Zimbra Collaboration - Email, calendar, collaboration server with Web interface and lots of integrations. (Source Code) GPL-2.0/CPAL-1.0Java