Oh, and apparently there's a new contender too - Play.js includes a fully functional Node.js implementation with support for npm (via package.json dependencies)

Oh, and apparently there's a new contender too - Play.js includes a fully functional Node.js implementation with support for npm (via package.json dependencies). So now you can basically use any NPM package on iOS. I can already tell that I'm going to get a lot of mileage out of it :)