SUPERIMPOSE X - Superimpose X is the most powerful and intuitive photo-editing application.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
BeautyPlus - BeautyPlus is a professional level of photo-editing app that makes it easy for you to edit your images as a professional photographer.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.