TUTOS Groupware Suite  
   Web-based groupware suite.
   http://www.tutos.org

ToutDoux  
   A project manager for GNOME part of the GNU project. French/english.
   http://www.gnu.org/software/toutdoux/

PyGantt  
   Reads a project description from a XML formatted file and outputs an HTML Gantt diagram.
   http://www.logilab.org/pygantt/

Project Management Interface  
   Web-based project management application. Provides portal management to a large number of coarsely-managed projects.
   http://majordojo.com/pmi/

PHProjekt  
   Web-based groupware tool which includes calendar, project-management, time-card management, PDA synchronization, email, voting system and personal to-do list management
   http://www.phprojekt.com

PhpCollab  
   Groupware module. Manage web projects with team collaboration, users management, tasks and projects tracking, files approval tracking, project sites clients access, customer relationship management (Php / Mysql or Sql Server).
   http://www.phpcollab.com/website/index.php

Double Choco Latte  
   Issue tracking and project management. Part of Gnu Enterprise project.
   http://dcl.sourceforge.net/

Achievo  
   A web-based project management tool, offering basic project and customer management. (PHP)
   http://www.achievo.org

Track+ Tracking System  
   Tool for tracking of issues, tasks and other items such as support calls, problem reports, bugs, action items, risks, requirements, and work packages. Uses web browser as client, servlet based web server, and SQL database. Written in Java, (JDK 1.2 or bey
   http://trackplus.sourceforge.net/

FUTURe Project Planner  
   A time management application written in Java including todo lists, Gantt charts, diaries, pert charts. Currently in early project stages.
   http://www.wolfkeeper.uklinux.net/FUTURe/

Gantt Project  
   Graphical Java program for editing Gantt charts. GPL
   http://ganttproject.sourceforge.net/

dotproject  
   BSD-licensed PHP-MySQL web-based project management application, with Gantt chart support
   http://www.dotproject.net/

Austin  
   C++ parser for which converts XML-based project files into Gantt charts
   http://austin.sourceforge.net

Taskjuggler  
   A tool to schedule and track complex projects. The textual project description is compiled into schedules, status reports and GANTT charts.
   http://www.taskjuggler.org

Project/Open  
   Web-based project resource planning system, with project rooms, and tools for managing clients, invoices, time, and cost. Designed for the advertizing, IT consulting, translation and knowledge management sectors.
   http://www.project-open.com/

ScrumWiki  
   Simple Wiki-based tool for applying Scrum project management techniques. Collaborative, open source, cross platform and with full version control.
   http://scrum.minty.org

Projectory  
   Open source, platform-independent, web-enabled project management tool for software projects based on Perl and MySQL.
   http://projectory.sourceforge.net/

WR Time Tracker  
   PHP-based work time tracking system, under X11-style "Liberal Freeware License".
   http://products.wrconsulting.com/wrtimetracker

Planner  
   Open source project planning and management application for the GNOME desktop.
   http://planner.imendio.org/

WebCollab  
   A web-based system for projects and project management.
   http://webcollab.sourceforge.net/

Gforge Project Management Tool  
   This part of the GForge collaborative development environment allows fine-grained control over tasklists, bugtracking, and gantt charts, with account management integrated into the overall product.
   http://gforge.org/