Plane Geometry Software
Many files of various math software are used on this site and can be downloaded free.
Mathematica is a general purpose software for doing mathematics. There are about 90 Mathematica notebooks on this site, and about 10 Mathematica packages. See Mathematica Packages for Plane Curves.
Mathematica home page: http://wolfram.com/
GeoGebra is a interactive plane geometry software.
GeoGebra home page: http://www.geogebra.org/ .
As of , there are ~60 GeoGebra files in this project.
Geometer's Sketchpad (GSP) is a interactive plane geometry software.
Geometer's Sketchpad Closed Shop?
There are about 117 GSP files on this site.
For the Mac, here's GSP's file type.
|◇||MINE type||file name suffix||Mac file type code||Mac creator code|
Note: for GSP versions before 4 (roughly before 2001), the file type for sketch files should be “GSPk”, and the creator code should be “GSP!”