Crank is a project to provide a GUI toolkit to facilitate (and where possible, automate) the breaking of classical (pen-and-paper) cryptosystems. Initial focus is on the cryptanalysis of monoalphabetic substitution ciphers.
I really like this app! Makes a great replacement for noodling on pen and paper when working from a textbook...
An 8-bit clean, POSIX-compliant line editor.
An image batch converter and resizer with advanced features.