async 11,3,11,8,5,11,5,7,9

Async utilities for node and the browser

bluebird 8,18,24,16,25,17,13,14,26

Bluebird is a full featured promise library with unmatched performance.

q 1,1,8,6,8,4,5,5,6

A tool for creating and composing asynchronous promises in JavaScript

co 5,4,5,8,3,7,5,2,8

The ultimate generator based flow-control goodness for nodejs (supports thunks, promises, etc)

when 0,2,-1,1,2,2,1,3,0

A solid, fast Promises/A+ and when() implementation, plus other async goodies.

noflo 1,-1,0,0,-1,0,0,1,2

Flow-based programming for JavaScript

step 1,0,1,0,0,0,0,0,1

An async control-flow library that makes stepping through logic easy.

suspend 0,0,0,1,0,0,-1,0,0

Callback-free control flow for Node using ES6 generators.

node-promise 0,0,0,0,0,0,0,0,0

Promise utilities for Node

deferred 0,0,1,0,0,0,0,0,0

Modular and fast Promises implementation for JavaScript

pify 0,1,0,0,1,0,1,3,2

Promisify a callback-style function

flow-js 0,0,0,0,0,0,0,0,0

Javascript Library for Multi-step Asynchronous Logic