GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals
Rapid Typing Tutor - Rapid Typing Tutor makes keyboard training fun and entertaining.
Dr. Geo - Dr. Geo, a software to design & manipulate interactive geometric sketches.
KTouch - KTouch is a program for learning how to touch-type, both for children and adults.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
10FastFingers - 10FastFingers is one of the effective typing speed checking tools that offer you a chance to enhance your typing speed in just a couple of days.