Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
RNI Films - Real film filters for iPhone photographers
GIMP - GIMP is a multiplatform photo manipulation tool.
Argentum Camera - A monochrome camera with beautiful effects
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Camera Noir - The most powerful black & white photo editor