DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
Brush Ninja - Hand-drawn Animated Gif Creator
Synfig Studio - Just another WordPress site
pixiv - pixiv is an illustration community service where you can post and enjoy creative work. A large variety of work is uploaded, and user-organized contests are frequently held as well.
Adobe Animate - Adobe Animate is a Flash, vector animation software.