Hashcat is the self-proclaimed world's fastest CPU-based password recovery tool. It is available free of charge, although it has a proprietary codebase. Versions are available for Linux, OSX, and Windows and can come in CPU-based or GPU-based variants. Examples of hashcat supported hashing algorithms are Microsoft LM Hashes, MD4, MD5, SHA-family, Unix Crypt formats, MySQL, Cisco PIX.