PostCSS plugin to add a collection of mixins, shortcuts, helpers and tools for your CSS
Detect/remove browser hacks from CSS files.
MongoDB Shell Enhancements for Hackers
a collection of re-usable scripts for bitsy game maker
Ponyfill for React 16's <React.Fragment> component
Simple functions to use IE-specific CSS hacks
patch DOM APIs to intercept calls to them
Collection of functions which make Angular a little less painful to work with externally
Library full of useful CSS and Sass functions, mixins, utilities, hacks, etc.
Monkey patches to ease mobile web app development