JSFuck uses only 6 different characters "[]()!+" to write and execute code. It is an esoteric programming style based on the atomic parts of JavaScript.
ChaCha Cipher is a stream cipher designed by Daniel J. Bernstein. It is a variant of the Salsa stream cipher. Several parameterizations exist; 'ChaCha' may refer to the original construction, or to the variant as described in RFC-8439.
LS47 Cipher is a slight improvement of the ElsieFour cipher as described by Alan Kaminsky. It use 7x7 characters instead of original (barely fitting) 6x6, to be able to encrypt some structured information. It also describe a simple key-expansion algorithm, because remembering passwords is popular.
Characters Escape & Unescape can escapes special characters in a string so that they do not cause conflicts, and unescapes Characters in a string that have been escaped.