VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts. Such maps can help you to improve your creativity and effectivity. You can use them for time management, to organize tasks, to get an overview over complex contexts
XPTracker is a Ruby on Rails application that facilitates project tracking in an extreme programming / agile development style. It features task, story, and iteration tracking for multiple projects, and it tracks developer time.