inih (INI Not Invented Here) is a simple .INI file parser written in C. It's only a couple of pages of code, and it was designed to be small and simple, so it's good for embedded systems. It's also more or less compatible with Python's ConfigParser style of .INI files, including the multi-line syntax.

To use it, just give ini_parse() an INI file, and it will call a callback for every name=value pair parsed, giving you strings for the section, name, and value. It's done this way because it works well on low-memory embedded systems, but also because it makes for a KISS implementation.