Glyphy - Copy & paste fancy fonts + cool symbols ☞✺✐™
Animista - Create beautiful CSS animations in your browser
SmartPaste - Copy-paste nicely styled text to apps like GMail and Google Docs without learning new shortcuts.
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
CopyPasteDesign.com - Quick visual annotation tool
Keyframes.app - A timeline editor for CSS animations