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Color Accent – Temporarily Free
Similar to Color Splash, Color Accent is an innovative application that helps you add a zing to your photos by allowing you to pick up to nine accent colors in your photo, and at the tap of a button converts your photo into black and white picture while keeping the selected accent colors untouched. This app usually retails for $0.99/£0.69 but today you can download it for free. Just click here to do so.