Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
RealWorld Photos - RealWorld Photos is an free portable photo editor for Windows.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Online Image Editor - Online editor for images and animated gifs with multiple effects and tools
Darktable - darktable is an open source photography workflow application and raw developer.
SoftColor PhotoEQ - SoftColor PhotoEQ makes color correction, image editing and color management tasks simpler.