Useful Libraries
GUI/interactive graphics
Clay
Responsive, Lightweight Immediate-mode UI layout in C https://www.nicbarker.com/clay https://github.com/nicbarker/clay
bzt scalable-font2
Very useful embedded font renderer https://gitlab.com/bztsrc/scalable-font2
Filesystems/archives
libdwarfs
fast file packing/archival filesystem format https://github.com/mhx/dwarfs