Adobe Animate - Adobe Animate is a Flash, vector animation software.
Spine - Spine is 2D animation software designed specifically for software and game development.
Wonderfl - wonderfl is a service where you can build Flash(swf) online.
Synfig Studio - Just another WordPress site
Aphalina Animator - Visual tool for creating interactive SVG animations: HTML5 banners, svg icons, interactive web...
Unity 2D - Unity 2D is a powerful and feature-rich game design solution built from the ground up to fulfill every basic and advanced need of the developer.