FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
digiKam - Professional Photo Management with the Power of Open Source
IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
FastPictureViewer - A hardware-accelerated image viewer for the modern Windows platform.
Sightengine - Effortless moderation of user-submitted photos. Instantly detect nudity and adult content with our easy-to-use API, for a fraction of the cost of human moderation