HTML5 Compatibility Sites

With all the rapid development of HTML5 and CSS3 going on, its difficult to keep track of how far along these hotly-anticipated new features are. Thankfully, there have been some beautiful and/or functional sites popping up to help gauge the feature’s support. Here’s a few great ones:

Web Designer’s Checklist

Web Designer's Checklist

HTML5 Readiness

HTML5 Readiness

HTML5 Test

HTML5 Test

CSS3 Please

CSS3 Please

Here’s a couple added bonuses:

on Quirksmode

HTML5 Compatibility Test

Is HTML5 Ready Yet?

Is HTML5 Ready Yet

Is HTML5 Ready Yet