JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
Adobe Animate - Adobe Animate is a Flash, vector animation software.
Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.
Express Animate - Easily create stunning 2D animations using keyframes with this motion graphics software. Export to video, flash, GIF or HTML5. Free Download for Windows.
Allegro - Allegro 4 and Allegro 5 are cross-platform, libraries mainly aimed at video game and multimedia...
KoolMoves - Inexpensive animation software that combines ease-of-use with powerful effects for creating high quality Html5, GIF, AVI, and SWF animations and mobile apps