Let's Enhance - Image upscaling supercharged
CaptionBot by Microsoft - Analyzing and describing images by a bot
YOLO - Real-time object detection
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.
CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Instagram Line Break - Simple clean line breaks for your Instagram captions