deCSS3

deCSS3 is a bookmarklet that will let you see how well your pages are gracefully degrading without having to open up IE6-8.

Try it out!

Feature Roadmap Matrix in the Cloud

Our cloud-based feature matrix serves as a roadmap for what is hopefully full support for all CSS3 properties.

<table> <thead> <tr> <th>Feature</th><th>Currently Supported?</th> </tr> </thead> <tbody> <tr> <td><code>animation</code></td><td>Yes</td> </tr> <tr> <td><code>background-clip</code></td><td>Yes</td> </tr> <tr> <td><code>background-origin</code></td><td>Yes</td> </tr> <tr> <td><code>background-size</code></td><td>Yes</td> </tr> <tr> <td><code>border-radius</code></td><td>Yes</td> </tr> <tr> <td><code>border-image</code></td><td>Yes</td> </tr> <tr> <td><code>box-shadow</code></td><td>Yes</td> </tr> <tr> <td>colors: <code>rgba, hsla</code></td><td>Yes</td> </tr> <tr> <td><code>column-count</code></td><td>Yes</td> </tr> <tr> <td><code>linear-gradient</code></td><td>Mostly</td> </tr> <tr> <td><code>@media</code> queries</td><td>Yes</td> </tr> <tr> <td>multiple backgrounds</td><td>No</td> </tr> <tr> <td><code>text-shadow</code></td><td>Yes</td> </tr> <tr> <td><code>transform</code></td><td>Yes</td> </tr> <tr> <td><code>transition</code></td><td>Yes</td> </tr> </tbody> </table>

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License

WTFPL yo.