Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Polarr - MacOS, Windows, iOS, Android and online photo editing tools & free photo editors.
GIMP - GIMP is a multiplatform photo manipulation tool.
Fotor - Fotor is an all in one visual platform. It includes photo editor, collage maker, and graphic designer. You are free to make a visual look more beautiful.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.