The OpenBSD man page language.
So many options.
My main gripe with Markdown is that it is different everywhere. The shared feature set of all of its dialects is too small to write most documentation. If you do commit to one dialect, however, it can be quite good.
Scribble would be my choice on purely technical grounds, but oh well.
Another implementation of dependency injection for Swift.
A FUSE file system for Git branches. Written in cross-platform Swift.
A file format for specifying the Web Components that your code exposes. Helps IDEs and other tooling understand your custom HTML elements.
Free SVG clip art.
A library of Web Components.
A very bright daylight lamp.
A video game.
Checks out only a subset of files into the working directory. Useful for large monorepos.
An NTP client and server designed for use with unstable networks and unreliable peers.
A C++ library that converts between smeared (UTC) and unsmeared (TAI) time scales.
UT1, UTC, or TAI? It depends on which two of the three desirable properties {steady time, calendar days, fixed units} you choose and which one you forgo.
Python plotting library for statistical data.