[brudgers]

The links to other projects with similar goals at the bottom of the Readme is brilliant. It helps developers solve their problems irrespective of whether this particular solution works...and solving problems not stars and forks is the measure of utility for a library.

[zanerino]

It's missing this link, which I previously thought was "the" co-routine de-facto standard for C before seeing all those other links: http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html

There's a link to the .h file near the bottom of the page.

That technique is what's used in protothreads and Contiki OS.