Crank is short for "CRyptANalysis toolKit", and its overall purpose is to provide a powerful and extensible GUI environment for solving classical (pen-and-paper) ciphers, providing as much automation as possible. Initial focus is on the cryptanalysis of monoalphabetic substitution ciphers. Screenshot here.
10138da429af76f9110c0ea15cea7d8ef95077494b162250f5eb89bda8b45509