Free42

Description:
Free42 is a complete re-implementation of the HP-42S calculator and the HP-82240 printer. Free42 was written from scratch, without using any HP code. You do not need any ROM images in order to use it, yet it is fully HP-42S compatible.

With each release, I build ready-to-run executables for Pocket PC, Microsoft Windows, PalmOS, and Linux (x86). There are also versions for MacOS X Dashboard and Sharp Zaurus / Nokia 770, contributed by fellow HP-42S enthusiasts, available via this site; see below for details.
Even if your favorite operating system is not in this list, you may still be able to get Free42 to work by building it from source (see below).
To check if you're up to date with the latest release, look here.

Requirements:
- Pocket PC Windows Mobile

More information:
http://free42.sourceforge.net/

Download