Iconosquare - Schedule now. We'll post on Instagram for you later!
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Later - Schedule and manage your Instagram posts
Ralpha Image Resizer - High-speed image batch conversion tool
Storyheap - Manage your SnapChat and Instagram stories.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats