GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org/

IMPORTANT NOTE concerning LICENSES

The software GeoGebra is licensed under GNU GPL v2 (or later).
However, as part of this SVN repository you will also find libraries 
and plug-in files that are subject to other licenses.
For details please read on and see the file LICENSE.txt

Other libraries and plugins used      
* MathPiper, https://mathrider.dev.java.net/
* Jasymca, http://webuser.hs-furtwangen.de/~dersch/
* FreeHEP Java Libraries, http://java.freehep.org/
* Java EPS Graphics2D package, http://www.jibble.org/epsgraphics/
* HotEqn, http://freemind.sourceforge.net/HotEqn/
* Tango Icon Gallery, http://tango.freedesktop.org/
* RestrictedFileSystemView class from Jython, http://www.jython.org/
* Mathworks/NIST JAMA Matrix Package, http://math.nist.gov/javanumerics/jama/