I'm not the OP, but I have also been looking for an alternative to the default calculator in OS2008. I basically want a decent scientific calculator, which must have an ln/e function. Multi-line display would be useful. I don't need graphing, but the OP might be looking for that (lybniz might work for that, if he needs that)

What I don't like about the built-in calculator is that you can't enter a long string of commands. Perhaps it is just a different (European?) style of calculator, but I find it very awkward to use. I am used to calculators like the TI-30XIIS, where you punch the full expression that you want and it shows up all on one line, then you hit "=" to get the answer.

I imagine that ANY other calculator that has been built for Maemo will be better for me than the existing one, so I'd just be interested to know what is out there.

Sorry if I am hijacking this thread, but hopefully this will also help the original poster.