A tool to show and add tags to images
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Console messages for cool kids
Legacy support for the CSS3 Flexible Box Model
Date() for humans
:triangular_ruler: Quickly create angled section edges using only Sass
JS string formatter that supports objects, currency, date/time, decimals, and more supports easy extension and garbage collection ... goes far beyond sprintf approach.