Afl Library
Typically associated with academic/research code (sometimes found on GitHub under similar names). The most referenced version is by A. G. Di Nuovo (2010s).
Its associative design offers unmatched flexibility, but that same design limits performance and type safety. It is not suitable for large-scale, high-performance, or safety-critical applications. afl library
Usually MIT or BSD – permissive.
#include "afl.h" #include <iostream>