You may add as many tasks as you want and organize them into as many groups as you view necessary. Just pick a name for the task, add a description, a date, a percentage of how much you have completed, and a personal assessment of it. You can also keep track of how you feel about certain activities that you do.
One of the most striking things about Phitodo is its interface, in addition to being fairly clean it is very convenient. The interface allows you to create new categories and tasks with a single click and in seconds.
Phitodo is a very interesting application for users who often have a lot to do. It is also free and easy to handle, so anyone can use it.
It requires Adobe Air.