The original TaskFreak!
A simple task management / todo list webapp, originally created in 2005. Lots of plugins available.
current version : 0.7.0 (stable)
Time tracking freak ?
For those of us who need to plan their work and keep track of the time spent on each project.
current version : 0.5 (beta)
Add a simple task management system to your Wordpress powered website.
Free & Open Source.
current version : 1.0