Optimage - Advanced image optimization tool
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Piio - Generates responsive images so you don't have to optimize
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
EOS Fitness - EOS Fitness is a dynamic platform that provides the best solution for peoples’ mental and physical health.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.