Alice 3.0 News
My campus is beta testing Alice 3.0 and it is very impressive.
We use Alice 3.0 to do lots of things, but really like using it to teach searching algorithms.

Looking for some problems to solve?
Python Challenge – if you want to write some code in Python to see if you are a hot shot Python programmer!
Project Euler – some really cool math problems
USACO Training Gateway – an online contest problem training site