Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Good Free Photos - Large free stock photo site with thousands of public photos
GIMP - GIMP is a multiplatform photo manipulation tool.
Skuawk Public Domain Photos - A large collection of free and artistically loud photos
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.