bluebird
Full featured Promises/A+ implementation with exceptionally good performance
co
generator async control flow goodness
run-async
Utility method to run function either synchronously or asynchronously using the common `this.async()` style.
thunky
delay the evaluation of a paramless async function and cache the result
async-each
No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.