So far it supports ASL, braille, katakana, hiragana, morse code, hexadecimal, roman numerals, rhyming slang, and most importantly vorticon. You're also welcome to submit pull requests for additional ones.
Now you too can have the world's most useless superpower, the ability to read braille VISUALLY. The demo page also has an interactive feature so you can see it in action without having to install it first.
It's also fully open-source and on the Firefox / Chrome stores.