Project management and bug/issue tracking system. Provides an interface to Subversion and an integrated wiki.

BSD-licensed PHP-MySQL web-based project management application, with Gantt chart support.

A flexible project management web application which includes a gantt chart, calendar, wiki, forums, multiple roles, and email notification. Information on the project, a demo, download information, and forums are provided. (Ruby)

A web-based system for projects and project management.

Web-based groupware suite.

Web-based groupware tool which includes calendar, project-management, time-card management, PDA synchronization, email, voting system and personal to-do list management.

A web-based project and resource management tool for business environments. The site includes product support, a demo, and a development blog. (PHP, MySQL)

A free software descendant of the web-based project-management and collaboration software originally created for SourceForge and later distributed as Gforge. Provides project hosting, version control, bug-tracking and messaging.

Web-based project resource planning system, with project rooms, and tools for managing clients, invoices, time, and cost. Designed for the advertising, IT consulting, translation and knowledge management sectors.

An application for managing tasks, projects and teams through an intuitive web interface. Documentation, community, blog, and download pages are provided. (PHP5)