Beaufort Cipher
The Beaufort cipher, created by Sir Francis Beaufort, is a polyalphabetic substitution cipher that is similar to the Vigenère cipher, except that it enciphers characters in a slightly different manner.
Plaintext:
Ciphertext:

The following buttons can be used to manipulate the text into various forms such as uppercase, lowercase, reverse text, etc. The choice text chosen will be copied and a new page will be opened.

The Beaufort cipher uses the following tableau (the 'tabula recta') to encipher the plaintext: