The Center for Engineering Education Outreach : Robolab - ROBOLAB is a software tool for programming LEGO's RCX brick as well as many other cool hardware components. Developed by the partnership between Tufts University, Lego Education and National Instruments, ROBOLAB is great tool for exploring robotics, science, image processing, music, and more.
The RCX, the revolutionary LEGO microcomputer.