Guggy - Make your friends laugh with personalized GIFs
Ralpha Image Resizer - High-speed image batch conversion tool
Giffing Tool - Giffing Tool is simply put: The fastest creator of high quality captioned GIFs available.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Data GIF Maker by Google - Google's new tool turns boring data into GIFs!
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.