QGifer QGifer is a tool for extracting part of a video to an animated GIF file. Features GIF extraction from a video file Color palette editor Variable... Free Open Source Windows Linux BSD Built-in Image editor Convert Videos to Animated Gifs Add a feature 11 Like Discontinued The project seems to be no longer developed. Last version, 0.2.1, released in June 2013, can be still downloaded from SourceForge.
Gifsicle Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations. Making a GIF animation with gifsicle is easy. Some... Free Open Source Mac OS X Windows Linux Command line interface Add a feature 10 Like
APNG Assembler Creates highly optimized Animated PNG files from PNG/TGA image sequences. CLI versions available for all major OSes. Free Open Source Mac OS X Windows Linux Portable Add a feature 2 Like
GIF to APNG Converts GIF animations into animated PNG format. Usually it makes the files smaller. CLI version is OS-independent, GUI version is available for Windows. Free Open Source Mac OS X Windows Linux Portable Add a feature 2 Like
GiftedMotion Easy to use GIF animator Free Open Source Mac OS X Windows Linux No features added Add a feature 5 Like
APNG to GIF Converts APNG animations into animated GIF format. Wu64 quantization is used for true-color files.s. Transparency is handled either using a threshold, or composed over... Free Open Source Mac OS X Windows Linux Portable Add a feature 0 Like