2D Software           (GPL: General Public License)

Software Cost (USD) Licence Platforms
Apollonius 3.99 US$ Proprietary iPhone/iPod Touch
Baghera ? ? Windows/?
Cabri Geometry (1986) ? Proprietary Windows, Mac OS X
Cabri-Euclide ? ? Windows/?
C.a.R. Free GPL Windows, Linux, Mac OS X
CaRMetal Free GPL Windows, Linux, Mac OS X
Cinderella 1.4 Free Proprietary Windows, Linux, Mac OS X (Java)
Cinderella 2.0 69 US$ Proprietary Windows, Linux, Mac OS X (Java)
Defi ? ? ?
DrGeo Free GPL Windows, Linux, Mac OS X
Euklid DynaGeo Shareware Proprietary Windows
Euklides Shareware Proprietary Windows
Eukleides Free GPL Windows, Linux, Mac OS X
Gambol ? ? Windows, Linux, Mac OS X
GCLC Free Proprietary Windows, Linux
GeoGebra (∼2001) Free GPL Windows, Linux, Mac OS X
Geolog ? ? Windows/?
The Geometer's Sketchpad (∼1963-1991) ? Proprietary Linux, Windows, Mac OS X (Java)
Geometric Supposer (∼1980) ? ? ?
Geometrix Free Proprietary Linux, Windows
Geometry Expert (GEX) ? ? Windows, Linux, Mac OS X
Geometry Explorer ? ? Windows, Linux, Mac OS X
Geometry Expressions ? Proprietary Windows, Linux, Mac
Geometry Tutor ? ? Windows/?
GeoNext Free GPL Windows, Linux, Mac OS X
Géoplan Free CeCILL Windows
GeoProof Free GPL Windows, Linux, Mac OS X
GeoView Free GPL Windows, Linux, Mac OS X
GEUP ? Proprietary Windows
GRACE ? ? Windows, Linux, Mac OS X
iGeom Free Proprietary Linux, Windows, Mac OS X
Isard ? ? Windows
Jeometry ? ? Windows, Linux, Mac OS X
JSXGraph Free GPL Windows, Linux, Mac OS X
Kig Free GPL Linux
Kgeo Free GPL Linux
KmPlot Free GPL Linux, Mac OS X
KSEG Free GPL Windows, Linux, Mac OS X
MathKit ? Proprietary Linux, Windows, Mac OS X (Java)
Mentoniezh ? ? ?
OpenEuclide Free GPL Windows, Linux
Tabulae Free Proprietary Linux, Windows, Mac OS X (Java)
WinGeom ? ? Windows
WIRIS ? Proprietary Linux, Windows, Mac OS X (Java)

3D Software

Software Cost (USD) Licence Platforms
Archimedes Geo3D Shareware Proprietary Windows/Mac OS X/Linux
Cabri 3D Shareware Proprietary Windows/Mac OS X
GeoGebra (from version 5.0) Free GPL Windows, Linux, Mac OS X
Geometria Free GPL Windows, Linux, Mac OS X
GeomSpace Free GPL Windows, Linux, OpenSolaris, BSD
GeomView Free GPL Unix
Géospace Free CeCILL Windows
GEUP 3D Shareware Proprietary Windows
Yenka 3D Shapes Free for non-commercial use Proprietary Windows
WIRIS ? Proprietary Windows, Linux, Mac OS X

Any-dimensional Software

Software Cost (USD) License Platforms Brief Info
SpaceFuncs Free BSD Windows, Linux,
Mac OS X (Python)
Uses FuncDesigner for parametrization and automatic differentiation,
OpenOpt for solving systems of geometric equations and numerical optimization