Webflow 3D Transforms - Build 3D interactions visually, without writing any code
Animista - Create beautiful CSS animations in your browser
Tridiv - Web-based editor for creating 3D shapes in CSS
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
iMeshup - Import, edit and share your 3D projects via web and mobile
Keyframes.app - A timeline editor for CSS animations