50g

I just ran across this today:

Open source, cross-platform, free desktop calculator:
http://www.speedcrunch.org/en_US/features.html

Project home:
http://code.google.com/p/speedcrunch/

RPN mode is planned as an enhancement.
<http://code.google.com/p/speedcrunch/issues/detail?id=18>

RPN calculator for Windows, 300 functions (Excalibur):
http://www.geocities.com/dbergis/freeware.htm

Are there any 48/49/50 series desktop emulators out there?

-- 
Cary Enoch Reinstein, Enoch's Vision Inc.  http://www.enochsvision.com
Blog: http://enochsvision.wordpress.com  -  "Behind all these manifestations
is the one radiance, which shines through all things. The function of art is
to reveal this radiance through the created object." - Joseph Campbell