American Fuzzy Lop (software)
American Fuzzy Lop (AFL), stylized in all lowercase as american fuzzy lop, is a free software fuzzer that employs genetic algorithms in order to efficiently increase code coverage of the test cases. So far it has detected hundreds of significant software bugs in major free software projects, including X.Org Server, PHP, OpenSSL, pngcrush, bash, Firefox, BIND, Qt, and SQLite.
Source: Wikipedia — American Fuzzy Lop (software) (CC BY-SA 4.0)