Animista - Create beautiful CSS animations in your browser
Spline - Design tool for 3d web experiences
Keyframes.app - A timeline editor for CSS animations
Kaedim - Use the Kaedim Platform to automatically transform your 2D art, sketches and photos in 3D.
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
Vectary - Vectary is a free, online 3D modeling tool and sharing platform.