Geogebra

NOT ON THE LIST IN 2015

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: –