I wish there was. The only semi-complete calculator I could find for my N800 is Free42, a HP-42S calculator emulator. I have a TI-89 Titanium calc whose ROM I'd love to use.

I'm not a developer, but I'm setting up a scratchbox environment now (using VMware) to see what I can do. Maybe I can do a simple ./configure & make for some open source TI calc emulator.

http://www.ticalc.org/programming/em.../software.html