OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Adobe Animate - Adobe Animate is a Flash, vector animation software.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Pencil2D - Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old...
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.