Animista - Create beautiful CSS animations in your browser
BeatFlyer - Create eye-catching videos in a few clicks with powerful visual effects that can sync to the music
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
Smart Create by OFFEO - Generate hundreds of animated designs with a single image.
Keyframes.app - A timeline editor for CSS animations
Adobe XD CC 13.0 - The future of experience design is here.