ResizePixel is a free online image editor where simplicity is essential feature. It is designed to crop, resize, flip, rotate and convert images to various formats. The service is mobile-friendly, fast and easy to use.
GIFmaker - GIFmaker gives you the freedom and flexibility to create unique, professional GIFS that are on-brand, on your own!
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
GIPHY Create - Create animated GIFs from videos (by Giphy)
Ralpha Image Resizer - High-speed image batch conversion tool
IncrediBooth Video - The photo booth app that creates video photo strips!
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.