Web Groupware
- OpenGroupware (PHP based groupware suite) (cvs) (ml) (forum)
- phpGroupWare (PHP based groupware suite) (cvs) (ml) (forums)
- Group-Office (PHP based groupware suite) (cvs) (ml) (forum)
- more.groupware (PHP based groupware suite. License: BSD-style and some parts GNU GPL) (cvs) (ml)
- PHProjekt (PHP based groupware suite)
- EGS ("Enterprise Groupware System". PHP based groupware suite.) (cvs) (ml)
- eGroupWare (PHP based groupware suite) (cvs) (ml)
- Covide (PHP based Dutch-language groupware suite) (cvs) (ml)
- NullLogic Groupware (C based groupware suite) (ml) (forums)