I'm a big fan of CP/M.
The first computer I owned was a Radio Shack TRS-80, so while I did not own a CP/M system in its heyday, I did use it a fair amount over the years, and I use it still under Simh on the Altair emulator.
I have a ton of old CP/M stuff, including operating system images, programming languages, applications, games, and lots of documentation. This is my chance to share it all, and it will go up in the Documents section as I am able to upload.
-Tom