From The Travis van der Font Wiki
The mother of all languages of awesomeness, pure C.
- LCUI (lc-soft.io) - A small C library for building user interfaces with C, XML and CSS.
- libui - A simple and portable (but not inflexible) GUI library in C that uses the native GUI technologies of each platform it supports.
- Simple Dynamic Strings - A string library for C designed to augment the limited libc string handling functionalities by adding heap allocated strings that are simpler to use and binary safe.