Favourite Photo Editing Apps

I've come across a few iPhone apps recently which have grabbed my attention and I've been enjoying playing around with. They're all based on fairly simple ideas, but you can create some startling effects with them. Here are a few examples using photos I've taken, some with my DSLR, some with my phone.

Diana
Free
Superimposes one photo onto another. There's a range of filters you can apply to create your finished effect.

Waterlogue
Paid
Transforms a photo into a watercolour painting. There's a choice of styles. I talked previously about this app here.

More Beaute
Free  
Softens and blurs lines. You control how far you want to go. I'm using my palm here as an example, rather than my own face!!

BokehCamFX
Free (lite version)
Pretties up photos using bokeh light effects. You choose placement, size, colour and opacity.

Do you have any more recommendations for me? Any apps you've found recently which you love?