HTML5 & CSS3 Readiness [html5readiness.com] is a relatively simple but cute data dashboard, completely created with CSS3, which tracks how much support exists for each new HTML/CSS feature. Its circular, sun ray-like design is based on an existing infographic about America's Wealthiest Religions.
The different browsers are grouped into color schemes based on their underlying rendering engine: all Firefox versions are shades of blue, Chrome/Safari - yellow, IE - pink. Each ray also has a different background color if it is a CSS3 feature. Each browser is represented with a tile on the bar and with an equal width of space. As a result, if a single bar is full, that specific feature has universal support among all the 8 browsers.