* [JavaScript sprintf()](http://www.diveintojavascript.com/projects/javascript-sprintf)
* [underscore.string](https://github.com/edtsech/underscore.string)
* [XRegExp](http://xregexp.com/)
* [Slang](https://github.com/devongovett/slang)
* [string.js](http://stringjs.com/)
* [stringview.js](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays/StringView) - a C-like interface for strings created by MDN
* [detect-indent](https://github.com/sindresorhus/detect-indent) - detect the indentation of code
* [stringify-object](https://github.com/yeoman/stringify-object) - stringify an object/array like JSON.stringify just without all the double-quotes