netOffice is a free web based project-management environment written in php/mySQL. netOffice allows managing and sharing information about teams, projects, tasks, deadlines and much more. It?s intuitive interface makes it a fast and optimal solution for medium size companies.

ACollab is an accessible, open source, multi-group, Web-based collaborative work environment. ACollab is available as a work groups addon for ATutor 1.4+ , and as a standalone collaborative work environment that will run on its own. ACollab is ideal for groups working at a distance developing documentation, collaborating on research, or writing joint papers, and ideal for online educators who wish to add group learning activities to their ATutor courses.

PMtool is a PHP based project management software to create tasks for change/bug requests, post timesheets, and calculate number of time used.

eGroupWare is a free enterprise ready groupware software for your network. It enables you to manage contacts, appointments, todos and many more for your whole business. eGroupWare is a groupware server. It comes with a native web-interface which allowes to access your data from any platform all over the planet. Moreover you also have the choice to access the eGroupWare server with your favorite groupware client (Kontact, Evolution, Outlook) and also with your mobile or PDA via SyncML.

phpGroupWare - formerly known as webdistro - is a multi-user groupware suite written in PHP. It provides about 50 web-based applications, as there are the Calendar, Addressbook, an advanced Projects manager, Todo List, Notes, Email, Newsgroup- and Headlines Reader, a Filemanager and many more Applications. The calendar supports repeating events and includes alarm functions. The email system supports inline graphics and file attachments. The system as a whole supports user preferences, themes, user permissions, multi-language support and unser groups. It includes modules to setup and administrate the working environment. The groupware suite is based on an advanced Application Programming Interface (API).

dotProject is a volunteer supported Project Management application. There is no "company" behind this project, it is managed, maintained, developed and supported by a volunteer group and by the users themselves. The software is free to anyone who would like to download it. Day to day support is provided free by volunteers.