Popsicolor is a great photo editing app from the creator of Percolator. It turns your photos into an ink drawing using two colours. It is easy and fun to use. You can load images from your photo gallery on your device or take a photo.
This is another photo editing app which allows you to be creative with both images and videos. You can select from a range of tools to create artistic effects.
Repix provides you with a range of artistic effects which you apply straight to the image by drawing on the iPad. This gives you freedom to add effects where you want.