A premier mind-mapping software written in Java
Free flexible open source todo manager featuring hierarchical tasks
The Freeplane add-on that syncs a GTD mind map with a todo.txt file
QNC is a command line interface app for creating quick notes
Create sticky notes, to-do list, journals & reminders all in one app
Vimat Is More than A To-do list
A simple issue tracker system.
The most popular mindmapping and brainstorming software
Selenio helps you manage your reminders in an extremely quick way
Create a task list while making minutes with OpenOffice or LibreOffice