Hi
I have developed a calculator for desktop and mobile. It works in Windows, Linux, Mac, Android and BB10.
It has some cool OpenGL 2D / 3D / 4D graphs, other stuff like, matrices, system of equations, the user can also create variables, math functions and math formulas.

You can check screenshots, videos and download the binaries in the website http://soft-ingenium.planetaclix.pt/
You can also use the source Luke https://github.com/joaodeus/mathgraphica

Hope you like it. I gladly accept comments and feature requests, some ot the stuff in MatGraphica I did it thanks to feedback I got.
Cheers
João

I have in my mind ideias for algorithms to solve symbolic integrals and derivatives, but thoose are a bit hard to implement, not sure when I will be able to do it. I'm also planning to add graphs from implicit math functions.

I took a look at the first video on your site. I really like how the animated graphs look. I'm not much of a math guy, but overall it looks like a pretty nice piece of software with quite a few features. Nice work.