Plots mathematical surfaces in 3D. Exports to VRML, POV, DXF. C++ source. Free

Spring modeling application allow moving bob and changing any params

Highly configurable Truly Random password and number generator.

Student calculator is ideal for use in the school, home, office or engineering

Powerful graphing calculator w/ advanced operations for statistics and algebra.

Play the classic pencil and paper game "dots and boxes" against your PC

Multipurpose scientific calculator with ample opportunities and high precision

Not from Russia, but you play with falling numbers and improve your math!

Graphing and analyzing mathematical functions