Free version of Crypto Helper,

Extremely fast and incredibly secure encryption tool that can be used as a second layer over any existing or future application. The simple design does not save any sensitive data that could later be used against your security. Once you quit the app, all secret data is erased.

Current features:
Using an algorithm similar to Vigenère and one time pad ciphers
Strong key derivation leveraging cryptographically secure random salts
Frequency analysis page finds how many of each ASCII character are found in a given string of text
Optional noise injecting feature injects random data into the cipher and increase entropy
Hexadecimal encoded bytes support any UTF-8 characters (accents, Cyrillic, etc.)
Random key generator