CollageMo - Easily create beautiful real life wall collages
Fotor - Fotor is an all in one visual platform. It includes photo editor, collage maker, and graphic designer. You are free to make a visual look more beautiful.
A Color Story - The photo app to colourize your life
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Shrub - Draw with your camera.
GIMP - GIMP is a multiplatform photo manipulation tool.