GEOS was also pretty well populated with various applications like the ones
you seek. You'd need a mouse for hardware and, unfortunately, I've not had
an easy time getting it to work well in emulation.
https://en.m.wikipedia.org/wiki/GEOS_(8-bit_operating_system)
GEOS was fun, fun to play with.
GEOCalc for the 64, assuming that exists, I have only used the C-128
version. There is also a program by Handic called CalcResult that may have
a 64 version, I have only used the B-128 version.
--
Bill