Open Source Project Management Tools in C#

Open-source time tracking tool (Windows Task Manager–style). Hierarchical tasks, statistics; for personal productivity and self-improvement.

CASE tool for writing use cases and maintaining requirements. Packages, actors, use cases; glossary, requirements, flow of events; export to HTML/PDF/RTF/XMI; multilanguage.

Tracker and manager for Extreme Programming: tracks user stories. ASP. NET/C# on SQL Server.