Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
GIMP - GIMP is a multiplatform photo manipulation tool.
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.