It's easy, fast and free. You can now use powerful CSS3 techniques, and don't waste your time writing each properties. First, write your code for your loved browser. Then, come here, paste your CSS code in the first block, and prefix! All vendor prefixes are added to your code. You can safely replace your old code.
HTML5 & jQuery Progress bar plugin : Percentage Loader
A showcase and tools for neat things to do with CSS - CSS3d.net
patterns - éléments
Advertisement Experienced developers understand that CSS3 can be added to new projects with progressive enhancement in mind. This ensures that content is accessible while non-supportive browsers fall back to a less-enhanced experience for the user. But developers could face a situation where a client insists that the enhancements work cross-browser, demanding support even for IE6.
README.md impress.js It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.
CSS3 Image Styles – Part 2 Previously I wrote two tutorials on how to style the image element with CSS3 inset box-shadow and border-radius. The trick is to wrap the image with a span tag and apply the image as background-image. However, I recently ran into a problem with that trick while designing the PhotoTouch theme. The issue is that the background-image is not resizable and thus it is not a good idea to use in responsive design.
CSS3 : 15 Ressources utiles pour vos prochaines réalisations - ressources-css3