AFL++
An actively maintained AFL fork with faster instrumentation, varied mutation and power schedules, QEMU, Frida, Unicorn, persistent mode, and custom mutators for discovering crashes and hangs.
Why use it
AFL++ lets teams build small harnesses around saves, maps, mods, network packets, and asset parsers, continuously exploring malicious or corrupt input combinations that manual testing rarely reaches.
Where it fits
Use testing, performance, accessibility, and diagnostic tools to remove problems players will notice.
What to check
The project is provided under Apache-2.0 and may be used commercially; fuzzing only explores inputs and paths reachable through its harness and does not replace protocol review, threat modeling, or platform regression.