– GEOGEBRA http://www.geogebra.org/cms/
Manual: http://www.geogebra.org/help/docues.pdf
– CARMETAL http://db-maths.nuxit.net/CaRMetal/index_es.html
Manual: http://db-maths.nuxit.net/CaRMetal/index_es.html
– KALGEBRA http://www.kdeblog.com/kde-education-iii-kalgebra.html