Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.
Swagger : Swagger is a powerful open source framework backed by a large ecosystem of tools that helps you design, build, document, and consume your RESTful APIs...
Bliss.js : Want to use Vanilla JS but find native APIs a bit unwieldy? Bliss is for you
jsfx : This is a javascript library (with frontend) for sound effect generation.
TCPDF : TCPDF is a FLOSS PHP class for generating PDF documents.
Given a web API, Generate client libraries in node, php, python, ruby
