Wunderkit is a new web based to-do manager that I just found out about from Lifehacker.
It is from the same group that made Wunderlist, which is a great to list app that I wrote about last March.
Wunderkit was in private beta but is now open to the public. It is a free web app and there are also stand alone download apps for Mac and iPhone.
It is great for managing projects as you can create multiple workspaces for different projects and collaborate with others on the project in Wunderkit. You create to-do lists and milestones for each project and then organize things in the order you need. There are also sections for notes and chat windows.
There is also a pro account for $4.99/month if you need more features but so far all the reviews say that the free version is all most people will need.
This is a great resource for students working on projects, teacher teams and administrators who are trying to organize and work collaboratively on projects.