Here's a link to a distribution for the E8 emacs-like editor I mentioned: https://tangentsoft.com/e8/wiki?name=HomeAlso, tangentsoft has a bunch of information about software development related to the PiDP effort, including their version of the C compiler.
https://tangentsoft.com/pidp8i/wiki?name=Home https://tangentsoft.com/pidp8i/doc/442d9cff50/src/cc8/README.md
The PiDP project has generated quite a bit of attention to the PDP-8 over the last several years.
Vince