Spirit - The animation tool for the web.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Lottie by Airbnb - Easily add high-quality animation to any native app
Ralpha Image Resizer - High-speed image batch conversion tool
Haiku Animator - Create powerful animations for any app or website
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.