A collection of free design tools to create unique backgrounds, patterns, shapes, images, and more with just a few clicks.
Keyframes gives you a visual timeline to help you create, view, and run animations without having to go back and forth between your browser and editor. And it gives you the CSS when you're done.
Ad mockups provides a free tool to create mockups of ads on the fly.
Animista is a place where you can play with a collection of pre-made CSS animations, tweak them and get only those you will actually use.