async 6,8,14,15,15,10,16,3,9

Async utilities for node and the browser

bluebird 5,16,11,9,17,12,11,8,4

Bluebird is a full featured promise library with unmatched performance.

q 0,12,3,8,10,4,2,2,9

A tool for creating and composing asynchronous promises in JavaScript

co 5,10,8,16,16,10,9,7,10

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

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

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

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

Flow-based programming for JavaScript

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

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

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

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

Promisify a callback-style function

deferred 0,0,0,0,0,0,0,0,0

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