Exposes predefined Unicode normalization functions that are required by many protocols. This is just a binding to ICU, which is said to be fast.
apt-get install libicu-dev # Debian
emerge icu # Gentoo
port install icu +devel # OSX using macports
npm install node-stringprep
var StringPrep = require('node-stringprep').StringPrep;
var prep = new StringPrep('nameprep');
prep.prepare('Äffchen') // => 'äffchen'
For a list of supported profiles, see node-stringprep.cc