An amazing tool to manage tasks with other people around the world. Try it, want it and it's free. [note mg]
Organize anything, together. Trello is a collaboration tool that organizes your projects into boards. In one glance, know what's being worked on, who's working on what, and where something is in a process.
All your projects, all your tasks, all of your team--organized, accounted for, and easily visible at a glance. New users instantly understand the list and card metaphor, and can be working on Trello within minutes.
Read more and try it: https://trello.com/