DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
Highly customizable vanilla JS tooltip/popover library
Fast, flexible, and lean implementation of core jQuery designed specifically for the server.
Fast & Robust Front-End Micro-framework based on modern standards
A lightweight, fast, feature-rich, powerful and highly configurable delayed content, image and background lazy loading plugin for jQuery & Zepto.
The new programming language for web apps
bind.js - simple two way data binding to HTML and callbacks
Eliminates layout thrashing by batching DOM read/write operations
A tiny tool for easily loading html fragments and templates
zoom in on any element in the DOM
A minimal WebAssembly virtual DOM to build C++ SPA (Single page applications)
Sieve is a jQuery plugin allows you to quickly add an interactive search filter to any block of content.