I love how specific yet comprehensive this package is. The manual appears to be lovingly crafted and from what I can tell, well written [1]. I don't know how many people are specifically looking to draw CAD diagrams of steam locomotives, but I absolutely love that this was someone's itch to scratch and they put so much time into this. [1] https://github.com/oskardolch/SteamCAD/blob/master/SteamCAD....
"5.1 What Next?
Some people may be interested in what are the future plans with SteamCAD. The answer is there are none. SteamCAD is finished software (the only one in the whole computer world?), there are no plans to extend it. It does everything it was supposed to do, if there are bugs in the software, they are now features of the software.
Well, not quite so. Of course, if the software need some adjustment in the future to work on new operating systems, it will be updated.
[...]
Despite what was written in the section 5.1, we have published a bunch of patches in November 2018. The patch includes several bug fixes, improved precision when snapping to objects and improved handling of paralel curve copies when the distance grows beyond the smallest curve radius."
This seems like a rare example of software that is not abandoned, but is "finished", and will suffer no feature creep. It is a romantic idea, for a piece of software to be conceived for an exact purpose, be programmed until it exactly fulfills that purpose, and then just be... done, a crystal molded to its niche.