liblx is an API to The X Window System, implementing the client side of the protocol spoken between clients and servers. It sits in the software stack at the same place as Xlib and xcb. (If you want you could think of it as a competitor to them. I prefer to think of them as complementary alternatives rather than competitors; their ideal use cases are different.)
At this writing, 2025-11-13, the only machines I know it works on are my own. Its native home is NetBSD, but I expect it to be an easy-to-trivial port to make it work anywhere libaio works.
(Yet to be written. I'll write a few small examples and see if any of the programs I've written using it would make good larger examples.)
My primary distribution mechanism is a world-clonable git repo: git://git.rodents-montreal.org/liblx is the thing to clone.
Almost all these pages—all, I think—are 100% hand-coded.