async 9,12,8,7,11,8,10,20,9

Async utilities for node and the browser

bluebird 4,6,10,11,12,10,1,9,10

Bluebird is a full featured promise library with unmatched performance.

q 5,4,4,4,7,0,4,0,-1

A tool for creating and composing asynchronous promises in JavaScript

co 4,9,12,6,7,0,13,1,12

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

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

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

noflo 0,3,1,1,1,0,2,1,0

Flow-based programming for JavaScript

step 1,-1,0,0,0,0,0,0,2

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

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

Callback-free control flow for Node using ES6 generators.

node-promise 0,0,0,-1,0,0,-1,0,0

Promise utilities for Node

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

Promisify a callback-style function

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

Modular and fast Promises implementation for JavaScript

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

Javascript Library for Multi-step Asynchronous Logic