Split Pic - Clone yourself and create collages!
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
MOLDIV - MOLDIV by JellyBus is a powerful photo editing app that offers everything you could wish for in photography.
GIMP - GIMP is a multiplatform photo manipulation tool.
Caralel - Connect smartphone cameras to capture multiple angles
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.