Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.
Dropzone.js : DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews.
TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
Leaflet : A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps
flatpickr : flatpickr is a lightweight and powerful datetime picker.
Lean, UX-driven, and extensible, yet it doesn’t depend on any libraries. There’s minimal UI b...
Modest Maps is a small, extensible, and free library for designers and developers who want to use interactive maps in their own projects.