Darktable - darktable is an open source photography workflow application and raw developer.
Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
Adobe Lightroom - Adobe Lightroom is a family of image organization and image manipulation software.
Nizo - A better iPhone camera for shooting film
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
VSCO Cam - VSCO Cam is an iPhone, iPod Touch, & Android camera app w/ elegant, minimal processing options.