bluebird3.7.2Full featured Promises/A+ implementation with exceptionally good performance
most1.9.0Monadic streams for Ultra-high performance reactive programming
native-promise-only0.8.1Native Promise Only: A polyfill for native ES6 Promises **only**, nothing else.
promiz1.0.6A proper compact promise (promises/A+ spec compliant) library.
when3.7.8A lightweight Promises/A+ and when() implementation, plus other async goodies.
promise-polyfill8.3.0Lightweight promise polyfill. A+ compliant
es6-promise-pool2.5.0Runs Promises in a pool that limits their concurrency.