It's only been a few weeks since social photo-sharing app Instagram released its API , but developers are trying their hand at it and coming out with new photo-linked services. Today, the Social Printshop is releasing not one, but three Instagram apps: Prinstagram , Instagrid , and Instawar . All three are fairly simple apps, but they provide features that Instagram currently lacks. Prinstagram, for instance, is a way to print your Instagram photos in a giant grid on a poster or individually on fun stickers.