Color Artistic LiteFree
Color Artistic lets you quickly and easily give photos a dramatic look by converting them to black and white,Negative,Sepia,Emboss,Comic,Blur... *Zooming in and out with two-finger *pinching gestures allows you to work on details with pixel-accuracy.
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Photo Editor by Aviary Free
A one-stop shop for any photo editing need." -Mashable "A very comprehensive photo editor...