Gnome-Todo-Manager is a lightweight tool for tracking todos with a notification mechanism. Other features include repetition, grouping and prioritizing the todos. It is written in Python/PyGTK and uses SQLite as its backend.
The simplest possible tool for managing a Roadmap for Extreme Programming projects. Supports planning, metrics, projections. It is modular, and can be adapted to your implementation of XP - without pulling a bunch of features that just get in your way.
This is a tool to organize and present complex, interrelated ideas visually in different ways. It aims to be many tools all at the same time -- outliner, mindmapping and concept mapping tool, PIM, project manager and tracker, literate programming editor,
taskcmd is a simple command-line tool to manage per project and per sub-project tasks. Tasks are subdivided into achievements, issues and to do entries. The reporting tool outputs weekly reports and yearly reports with filtering capabilities.