MathGraph32 is a geometry and analysis software, distributed under the GNU GPL v3 (since on 15/05/10 the software author, Yves Biton decided to release as free software). MathGraph32
Java is translated, Now, in three languages: French, English and English.
Thanks to the work of CeibalJAM , especially Prof. Luis Belcredi and Mr. Marcos Orfila this software was "unsugarized", or may run on a laptop XO (OLPC XO). Download
activity for the XO
NOTE:
Mathematics Prof. Luis Belcredi in place has much to share educational materials, has also written several books on mathematics, you can see here .
Among them, you can download the book free for teachers 1, New Mosaics , first-year basic cycle, adapted to the new math program, Reformulation 2006.
also has a site called Xo (xsubcero) hangs especially where materials for the XO
MathGraph 
