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!
Linux system call fuzzer
Janus: a state-of-the-art file system fuzzer on Linux
Hydra: an Extensible Fuzzing Framework for Finding Semantic Bugs in File Systems
Witcher is the first framework for using AFL to fuzz web applications.
An Android port of radamsa fuzzer
An Android port of the melkor ELF fuzzer
GraphFuzz is an experimental framework for building structure-aware, library API fuzzers.