GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.
Cabri - Cabrilog presents its maths software: Cabri 3D, Cabri II Plus and Cabri Jr. Maths softwares
Giac/Xcas - Free computer algebra system
GrafEq - GrafEq (pronounced “graphic”) is an intuitive, flexible, precise and robust program for producing...
Dr. Geo - Dr. Geo, a software to design & manipulate interactive geometric sketches.
Geometry Pad - Geometry Pad is a dynamic geometry application for iPad and Android tablets.