Achievo: A web-based project management tool, offering basic project and customer management. (PHP)
Austin: C++ parser for which converts XML-based project files into Gantt charts
dotproject: BSD-licensed PHP-MySQL web-based project management application, with Gantt chart support
Double Choco Latte: Issue tracking and project management. Part of Gnu Enterprise project.
FUTURe Project Planner: A time management application written in Java including todo lists, Gantt charts, diaries, pert charts. Currently in early project stages.
Gantt Project: Graphical Java program for editing Gantt charts. GPL
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.
PHProjekt: Web-based groupware tool which includes calendar, project-management, time-card management, PDA synchronization, email, voting system and personal to-do list management
Project Management Interface: Web-based project management application. Provides portal management to a large number of coarsely-managed projects.
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.
Projectory: Open source, platform-independent, web-enabled project management tool for software projects based on Perl and MySQL.
proManager: A PHP-based project manager and todo list with a recursive task and user tree, task-related forums and notes. Runs on various databases.
PyGantt: Reads a project description from a XML formatted file and outputs an HTML Gantt diagram.
ScrumWiki: Simple Wiki-based tool for applying Scrum project management techniques. Collaborative, open source, cross platform and with full version control.
Taskjuggler: A tool to schedule and track complex projects. The textual project description is compiled into schedules, status reports and GANTT charts.
ToutDoux: A project manager for GNOME part of the GNU project. French/english.
Track+ Issue Tracking System: Web based tool for bug, issue, and task tracking. Offers Gantt charts, diagrams, configurable workflows, email reminders of due tasks and PDF reports.
TUTOS Groupware Suite: Web-based groupware suite.
WebCollab: A web-based system for projects and project management.
WR Time Tracker: PHP-based work time tracking system, under X11-style "Liberal Freeware License".