ImgOps - Useful collection of online image tools that you can launch directly for any web image.
CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
Posteroid - Posteroid app offers features that let you turn your images as well as text into a graphic poster so you can share them on various social media platforms to enjoy them with friends.
LayerX - An intuitive app to display transparent images on screen.
JPEG-Repair Toolkit - JPEG-Repair Toolkit is a utility for repairing corrupt photos.
Osiva - Osiva" is an acronym that stands for "Overly Simple Image Viewing