Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
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.
GIMP - GIMP is a multiplatform photo manipulation tool.
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.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
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.