Software: Microsoft Mathematics (Free)

Tackle math and science problems quickly and easily, using Microsoft Mathematics from Microsoft Education Product Center. Here is an excerpt from their site about the product: "From basic math to precalculus, Microsoft Mathematics 4.0 can help you visualize and see mathematical concepts as you’ve never seen them before. This free downloadable tool includes step-by-step instructions and explains fundamental concepts. The wide range of tools to help students with complex mathematics includes a full-featured graphing calculator that’s designed to work just like a hand-held calculator and ink handwriting support to recognize hand-written problems."