Plane Geometry Software

By Xah Lee. Date: . Last updated: .

Many files of various math software are used on this site and can be downloaded free.


Mathematica icon 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:



GeoGebra is a interactive plane geometry software.

GeoGebra home page:

As of , there are ~60 GeoGebra files in this project.

Geometer's Sketchpad

gspIcon gsp Geometer's Sketchpad (GSP) is a interactive plane geometry software.

Geometer's Sketchpad Closed Shop? Free Download!

There are about 117 GSP files on this site.

For the Mac, here's GSP's file type.

Geometer's Sketchpad Mac OS file type
MINE typefile name suffixMac file type codeMac 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!”

Cabri Geometry

Cabri Geometer II is a interactive plane geometry software.

Cabri Geometer II home page is

Cabri Geometer Mac OS file type
MINE typefile name suffixMac file type code

There are 24 Cabri files on this site.

Graphing Calculator

Graphing Calculator is a program that plots curves and surfaces, with many interactive features that let you move a slider to change paramter. You'll find graphing calculator files with this icon: gcf icon. Its file has suffix gcf. It is available for Windows and Mac. Its home page is

There are 71 gcf files on this site.