Simple Online Planning
The Freeplane add-on that syncs a GTD mind map with a todo.txt file
Easy-to-use personal time tracking application for Windows and Unix
Create sticky notes, to-do list, journals & reminders all in one app
Program for manipulating with mind maps
Open Source, tasks, bug tracking, agile scrum, timesheet, wiki
A tool for tracking tasks of repetitive manual processes
Cross-platform desktop bookmarking tool