ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Tweeig - Repost any tweet to Instagram or other social media
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Twiger - Share tweets on Instagram
Ralpha Image Resizer - High-speed image batch conversion tool
TweetPik - Easily convert tweets to images SVG, PNG and JPG