A premier mind-mapping software written in Java
The Freeplane add-on that syncs a GTD mind map with a todo.txt file
Free flexible open source todo manager featuring hierarchical tasks
Simple and useful time tracker
Create sticky notes, to-do list, journals & reminders all in one app
Open Source, tasks, bug tracking, agile scrum, timesheet, wiki
A simple issue tracker system.
Organise your finances, notes and media collection.
Work productivity/efficiency analytics, work-life and time manager
Frantic Squirrel will be a simple to-do list program using Qt