E+lements is a minimal DOM Library for the prime framework.
A truly modular frontend framework
Tapestry 5 jQuery integration. Fully replace Prototype and Scriptaculous with jQuery with as less as possible compatibility issues
MagJS - Modular Application Glue
Replace jQuery or MooTools with a <4kB Library
MooTools Core Repository
A sizzlin' hot selector engine.
HTML render engine and data binding (MVVM)
⚡️ A component based library that encourages single-page applications.