PHProjekt is a modular application for the coordination of group activities and to share information and documents via intranet and internet. Components include: calendar, project management, time card system, file management, contact manager, mail client

phpGroupWare is a multi-user groupware suite that provides about 50 web-based applications: Calendar, Addressbook, an advanced Projects manager, Todo List, Notes, Email, Newsgroup and Headlines Reader, a Filemanager and many more.

Originally commenced in 2000, dotProject was developed as a state of the art Project Management tool from the start. The original theme flagged dotProject as an open source alternative to Microsoft products and other expensive, commercial applications.

eGroupWare is a multi-user, web-based groupware suite developed on a custom set of PHP-based APIs. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do's, phone calls), content management, forum, bookmarks, wiki.

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

Double Choco Latte is a GNU Enterprise package that provides basic project management capabilities, time tracking on tasks, call tracking, email notifications, online documents, statistical reports, a report engine, and more features are either working or

Simple Groupware is a complete groupware package written in PHP, XML, SQL, HTML, CSS and sgsML, a new programming language created to quickly create powerful web applications.

TWIG is a PHP groupware tool and application framework. TWIG is a simple, cross-platform, fast and browser-independent way to access or share almost any kind of information.

phpCollab is an open-source internet-enabled collaboration workspace for project teams. Modeled on Macromedia Sitespring, phpCollab architecture allows for the consulting team to share information with each other in one space and publish that information,

PPTS is a WEB-based environment supporting teams who have chosen to develop software according to the agile methodologies Scrum and/or eXtreme Programming.

webERP is a web based accounting/ERP software produced by an ongoing community of accounting software developers.

more.groupware is a complete web-based groupware application based on open source components like PHP, MySQL and Apache.

DevTeams is a web-based project management system designed primarily, but not exclusively, for developement teams that need to coordinate many projects with different clients. It is built on on top of emerging Zend Framework.