Factorizer
For factoring integers, finding primes and plotting associated histograms.

Calc 3D Pro
Calc 3D is a collection of mathematical tools for highschool and university.

ACA Audio Recorder
Records audio streaming from any source into WAV, AVI and MP3 file. Free to try

ACA Capture
Screen capture from desktop screen, output to popular file formats.

Universal Desktop Ruler
Measure not only a straight line distance but any curved distance on the Screen