Instagram Automatic Posting by Iconosquare - Schedule now. We'll post on Instagram for you later!
Ralpha Image Resizer - High-speed image batch conversion tool
Grum - Post on Instagram from your computer!
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Instaplus - Instaplus is an Instagram automation solution that utomatically likes, comments, follows, and unfollows the target audience.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.