Chai : Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.
toxy : toxy is a fully programmatic and hackable HTTP proxy to simulate server failure scenarios and unexpected network conditions, built for node.js/io.js.
Statsd : A network daemon that runs on the Node.js platform and listens for statistics, like counters and timers, sent over UDP or TCP and sends aggregates to ...
asdf : Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more
Hack a Day : Hackaday serves up Fresh Hacks Every Day from around the Internet.
Tessel 2 is a development platform you can embed in a product. Build fast with Node.js/io.js, then optimize the hardware and build thousands.