Maybe not exactly what you are looking for, but there are some (scentific) flash calculators out there.
e.g.
http://www.karlin.mff.cuni.cz/~motl/...culator-hp.swf
http://www.karlin.mff.cuni.cz/~motl/...lator-demo.swf
http://heilong.oceanography.ru/flash/calculator/#

Should also run on the Nokia Tablets, and if you download the swf files, even offline.