svg editor: Easily create documents for math, physics, chemistry...
A Gem Stone weight estimator/calculator for mounted gemstones in items
The new site is at http://psychometricon.net/libirt/
Generate and solve Travelling Salesman Problem tasks
MathTools is an aid in preparing printed math tests.
ARO helps physically disabled students to create mathematical drawings
invert matrices with the Gauss–Jordan elimination
GCFP is an open-source tool for visualizing complex functions.