imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Gumlet - Gumlet is an end-to-end video streaming and image delivery platform
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.