Silent Camera [High Quality] - Silent Camera [High Quality] is probably the best silent camera app that comes without any shutter sound so that you can take pics without making any sound.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
HD Camera for Android - HD Camera for Android is a tremendously used mobile camera app that brings all the advantages of using a full-fledged camera.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
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.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.