I am a member of the set of people who are "at least reasonably competent C and Unix programmers".
My most ambitious project is UNG, which aims to be a complete implementation of the Single UNIX Specification (aka POSIX).
In a similar vein is a collection of work under the umbrella of Outerix. The aim is to provide strictly conforming tools and libraries to Windows users.
I have a number of smaller projects available on my personal Git site. Many are also mirrored on GitLab and/or GitHub).
I have also made several contributions to free and open soure software outside of my own programs. I also have a list of software I wrote but no longer maintain provided here for completeness.Copyright © 2020 Jakob Kaivo <email@example.com>