Hexo is a fast, simple and powerful blog framework. You write posts in Markdown (or other languages) and Hexo generates static files with a beautiful theme in seconds. Lot of plugins and themes available.

DropzoneJS is an open source library that provides drag’n’drop file uploads with image previews.

Stylemug is a fast css-in-js library that extracts atomic CSS rules to a .css file. It generates atomic CSS from the static stylesheets defined in JS. The compiled rules are extracted to a .css file.The stylesheet code in the Javascript bundle is replaced (no CSS in JS) with a hash map for classnames lookup at runtime.