Although all options are credential testing tools, Hashcat is designed for optimized performance on both CPUs and GPUs and is highly effective for cracking various types of hashes, including MD5. Its GPU acceleration capabilities significantly reduce the time required to crack hashes. John the Ripper also supports hash cracking but is typically outperformed by Hashcat when GPU resources are utilized. Cain is generally used for network sniffing and password recovery but is not as versatile as Hashcat for hash cracking. CeWL is actually a custom word list generator tool and not a hash cracking tool, so it does not apply to the direct cracking of hashes.