Roslyn-based library that offers more than 50 analyzers and more than 70 refactorings for C#.  

Various icon animations made with mo.js, a powerful motion graphics library by Oleg Solomka.  

A lightweight (2.2 KB), no-dependency top progress bar library.  Demo

A JS library for building WYSIWYG editors for HTML content.  Demo

Trianglify is a library that I wrote to generate nice SVG background images like this one:

A small, fast, modern, and dependency-free library for lazy loading.  Demo

Modular and light-weight selection library for jQuery and Zepto.js  Demo

Library for transition animations between blocks (pages) in the application Demo