Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Manual Camera for iPhone - Custom exposure for your iPhone camera
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Snapseed - Snapseed is a photo enhancement and sharing app with a powerful suite of imaging filters and tools...
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.