bluebird
Full featured Promises/A+ implementation with exceptionally good performance
fishbird
Fishbird is a simple, lightweight, and fast Promise utility library
ambi
Ambi lets you execute any function ambidextrously; providing you the ability to execute any function (be it synchronous, asynchronous, returns, callbacks, promises) as if it returned a promise.
each
Chained and parallel async iterator in one elegant function.
cpsfy
Tiny goodies for Continuation-Passing-Style functions