Base56 is a variant of Base58 omitting the characters '1' and 'o' to avoid confusion. Its purpose is to make it easy to both type and copy/paste encoded data.
JSFuck uses only 6 different characters "[]()!+" to write and execute code. It is an esoteric programming style based on the atomic parts of JavaScript.
Jother is an encoding method used in JavaScript to encode strings using a concise anonymous function approach with a small set of characters. Similar to JSFuck encoding, Jother encoding employs just 8 characters: !+()[]{}.