prelude-ls
prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.
underscore.string
String manipulation extensions for Underscore.js javascript library.
cssesc
A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.
voca
The ultimate JavaScript string library
simple-fmt
maximally minimal string formatting library