Cipher Solver allows for the quick and easy encryption and decryption of classical cryptography algorithms. Currently, the application supports Caesarian Shift Ciphers, Vigenre Ciphers, and ROT13 ciphers as well as a frequency analysis tool.
Update: Now features frequency analysis tool.
Update 2: Tweaked frequency analysis tool based on feedback from Danny Piper
Update 3: Return to development! Added Atbash and Text Reversal options
Check it out on GitHub: