A CAS on the N800 would be great!

Before giving up and buying a TI nSpire a month ago, I did some survey on the existing CAS OSS projects and ended concluding that a GNU TeXmacs port to N800 would be probably a wiser place to start. It's not a CAS itself, but it can be used as a GUI frontend to many CAS, like Maxima or Yacas, and also GNU Octave.

Not to mention that you would also get a WYSIWYG word processor as a side effect, something N800 users would kill for...

http://www.texmacs.org/