I noticed the slick CSS3 transitions on the social media icons on the DrupalCamp Toronto website and started digging into how the developer (Toronto's Substance) did that. I'm late to the game on the tool they used, Symbolset, but colour me impressed. Symbolset, a semantic symbol font, maps words to icons. It looks great on retina mobile displays, it's accessible, and performs really well. I can't wait to use it somewhere.