Pure CSS syntax highlighter, no Javascript required. Includes built-in tooltips with UI themes and syntax highlighting themes.
You may also be interested in ...
Arrow JS
Reactivity without the Framework. A tiny ~2kb library for building reactive interfaces in native JavaScript.
Electerious
A lightbox that works in all modern browsers with images, videos, iframes and any kind of HTML, has support for CommonJS and AMD, a simple API and zero dependencies.
Destyle.css
Destyle.css is a reset stylesheet that provides a clean slate for styling your html. Made with love by Nicolas Cusan.