We've open sourced our HTML5 equation solver and grapher.
hunterdavis.comSeems like a nice graphic calculator. It could be really useful on a short and memorable domain.
quickgrapher.com shows up as an expired domain on Jan 20, 2012.
Yeah I let it expire after the SOPA stuff with godaddy. Doesn't get quite as many hits as you'd expect, but I didn't exactly bend over backwards advertising it either.
+1