This is CT60 TOS 1.03e based on 1.03c with modifications by Willy and my own changes. It contains the complete archive with updated both sources and binaries.
Releases from 1.03c onwards are available in the releases section. All the official releases can be accessed as separate commits (click on <> button, then Clone or download and Download ZIP).
The master branch also contains Didier's la(te)st work (CT60/CTPCI TOS 2.02 beta), including source code for both the OS and drivers. See its README.md for the (convoluted) way how this repo is organised.
Website source files are available in the gh-pages branch.
You might be interested in insane/tscc's work on CT60TOS 1.05 which merged pieces of CT60TOS 1.03x, Patrice Mandin's BIOS setup and of course many improvements.