- Modernizer (now in version 2) has a nice modular approach: like JQueryUI, you can choose what features you would like to have supported. The à la carte menu includes elements from HTML5, CSS3 selectors and properties (including transforms and transitions) and associated technologies such as Geolocation, SVG and WebGL.
- Headjs loads scripts and organizes scripts, and updates HTML5 and CSS3 support for IE.
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