ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
instashare - Share your photos to instagram from your mac
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Frame.io Watch Folders - Accelerated, secure, & indestructible uploading to Frame.io
Ralpha Image Resizer - High-speed image batch conversion tool
Pushbullet - Pushbullet - Your devices working better together