AFLplusplus / AFLplusplus

AFL++ is a state-of-the-art fuzzer, and #1 in benchmarks. It was originally based on AFL. Today it comes with qemu 5.1, collision-free coverage, enhanced laf-intel & redqueen, AFLfast++ power schedules, MOpt mutators, unicorn_mode, and a lot more!

libexpat / libexpat

:herb: Fast streaming XML parser written in C99 with >90% test coverage; moved from SourceForge to GitHub

google / honggfuzz

Security oriented software fuzzer. Supports evolutionary, feedback-driven fuzzing based on code coverage (SW and HW based)