Halide - A premium camera for your phone
Darktable - darktable is an open source photography workflow application and raw developer.
Camera+ - With Camera+ you’re able to use your iPhone to shoot the best photos you possibly can.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
SLOW SHUTTER CAM - SLOW SHUTTER CAM is an app presented in the market by Cogitap Software to take the photo capturing experience to a whole new level by taking photos after adjusting the shutter speed.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.