vue.js : Vue.js is a library for building interactive web interfaces. It provides data-reactive components with a simple and flexible API. Core features includ...
hogan.js : A compiler for the Mustache templating language
dancer.js : dancer.js is a high-level audio API, usable with both Mozilla's Audio Data API and Webkit's Web Audio API with flash fallback, designed to make sweet ...
impress.js : It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com
ClippyJS : Add Clippy or his friends to any website for instant nostalgia.
For web application developers, the '''JavaScript Templates''' engine from TrimPath is a lightweight APL / GPL open-source component that lets you have template-based programming (like PHP/ASP/JSP) while running in a web browser