Meanwhile, over in Europe: http://www.geogebra.org/cms/
Geogebra is open source and funded with EU grants. They're about to launch version 4, I think, but I don't care because v5 has been in stable beta for the last 6 months.
Geogebra is open source and funded with EU grants. They're about to launch version 4, I think, but I don't care because v5 has been in stable beta for the last 6 months.
Tax money = public domain