Geogebra

NOT ON THE LIST IN 2016

A geometry package providing for both graphical and algebraic input.

Website:  www.geogebra.org
Cost:  Free. Open source
Availability: Online
YEARLY RANKINGS
2015: –  2014:
 –  2013: –  2012: –  2011: 50  2010: –  2009: –  2008: –  2007: –