Groupware
Zimbra Collaboration
Email, calendar, collaboration server with Web interface and lots of integrations. (Source Code).
Tracim
Collaborative Platform for team collaboration: file,threads,notes,agenda,etc.
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).
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).
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).
Group Office
Enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients. (Source Code).
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).
Digiwall
Create multimedia collaborative walls for in-person or remote work (documentation in French). (Source Code).
Digistorm
Create collaborative surveys, quizzes, brainstorms, and word clouds (documentation in French). (Demo, Source Code).
Digipad
An online self-hosted application for creating collaborative digital notepads (Documentation in french). (Source Code).
Cozy Cloud
Personal cloud where you can manage and sync your files, notes, contacts, passwords, and documents. (Source Code, Clients).
Citadel
Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more. (Source Code).