ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
Sails.js - Realtime MVC Framework for Node.js
Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.
Koa.js - Next generation web framework for node.js
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.