APNG to GIF - Convert APNG animations into animated GIF format.
showFoto - ShowFoto is the standalone image editor of the digiKam project.
Animator - Animator is a small animation tool. Using Animator is really easy. Example : Drop file1.bmp.
PixBuilder - Free Photo Editing Software for PC
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.