Step is an interactive physical simulator. It allows you to explore the physical world through simulations.
Kuckt
Kig is an interactive mathematics software for learning and teaching geometry.
Kalkuléieren
Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).
GeoGebra
Kritt eisen gratis online Mati-praktescher Handwierk fir Gravie, Geäischtter, 3D, a méi!