Maple13 from MapleSoft

Maple is a technical computing software which contains a highly advanced symbolic computation engine, powerful numeric solvers and an intuitive technical document interface. Maple 13 includes completely new 3-D plotting facilities, powerful new learning and problem-solving tools, and additional resources to enable users to find answers to questions quickly. New plotting facilities include extensive annotation tools and fly-through animations, making 3-D plots more meaningful and easier to interpret.

Check them out here!