If you are looking for good generic data structures in C, klib is an good alternative as well: https://github.com/attractivechaos/klib
One thing missing there is a good rbtree implementation. I found the one from jemalloc is dependency-less and easy to use: https://github.com/jemalloc/jemalloc/blob/dev/include/jemalloc/internal/rb.h
So is this sort of like glib in scope and value proposition, but without the GNOME history?
I wonder how fast their Sorting Algorithms implementations is.
Could anyone link to other similar Toolkits?
Not the same thing, but in terms of hash algorithms the ones they offer are far from state of the art (at least in speed.)