WeekToDo is a Free and Open Source Minimalist Weekly Planner and To Do
Easy-to-use personal time tracking application for Windows and Unix
Simple and useful time tracker
Sticky notes/post-it application for linux
PWM let you organize your project in a Web 2.0 way.
Extended desktop Markdown and Todo.txt editor for Windows
A lightweight but advance note taking application
Organise your finances, notes and media collection.