Welcome to MathDrag'n!
Welcome to the amazing world of MathDrag'n. MathDrag'n is an interface designed to help you, the user, maintain almost complete control over the algebra while stopping you from making mistakes. In contrast to most computer algebra systems, MathDrag'n's philosophy is that the user interface is first, and that ease of use is what you want. No need for learning long command names and syntax. No need to look up things in help if you've never used them before. Everything is available, at your fingertips, through a simple GUI interface.
Links:
MathDrag'n Sourceforge Page