I did some early documentation of the Linux advanced networking capabilities when they came out in 2.2; it was widely cited for a while. I couldn't grow it effectively and others supplanted it reasonably quickly. [1]

I don't work easily with others so I tend to publish projects in hope they're useful enough for others, then never revisit or update them. My python arrays / mmap slicer module [2] got into FreeBSD ports for several years and I was told was used in some of the early dedicated media player things.

Source available that I can point to would be my OpenSCAD box script [3], which some kind soul has taken on after I left it.

These contributions are not much to compare to the value, and joy, that has been given to me by others in the form of their freely shared work; but I hope that by contributing in the same spirit that I have done my part to help improve the world, as well as sharing my joy in geeking out over stuff others may not care about.

[1] https://web.archive.org/web/20030601115204/http://www.snafu....

[2] https://web.archive.org/web/20030317074418/http://snafu.free...

[3] https://github.com/sbambach/MarksEnclosureHelper