TeeSpring - Create & sell t-shirts you can be proud of
ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Merch by Amazon - Create, sell, and promote custom branded t-shirts
Famous Engine - The Famous Engine is a free and open source JavaScript rendering engine.
Printful - White-label printing under your brand. Free shipping and 20% off samples + 3 day average turnaround.
Chart.js - Easy, object oriented client side graphs for designers and developers.