Lurch

The word processor that can check your math

About

Your word processor has spelling and grammar checkers. Your math word processor should check your math. (Not just arithmetic, but algebra, calculus, and proofs as well.)

That is what Lurch does; it is a simple math word processor with a general-purpose math checker built in. The project began in June 2008 and version 0.75 has recently been released. You can download it free for Windows, Mac, or Linux.