InstaSquarer is a flexible, powerful app for taking and posting pictures to Instagram. You can either post photos from your albums or take pictures directly in the app itself. You can easily drag and scale images, and InstaSquarer can export images with a resolution of up to 1200 x 1200. You can share these photos directly to Instagram, as well as Facebook, Twitter, and other photo sharing apps.
The app is powered by the Nokia Imaging SDK, and has a large library of effects and filters. You can select and combine the 21 filters, layering them on top of one another for different effects. Adjust everything from the brightness to the saturation, and add effect styles such as night vision, sepia tone, and paint. The app just updated to version 2.0, bringing it into feature parity with the iOS version by adding new filters, effects, and more.
You can download InstaSquarer here for free on the Windows Phone Store.