Adobe Animate - Adobe Animate is a Flash, vector animation software.
JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
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.
CKEditor - Real-time collaborative future-ready rich text editor
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
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.