HTC Gallery is an image gallery by HTC that is intended for HTC devices, but will also work on non-HTC devices as well. (Requires sideloading the .apk, as the app cannot be installed to non-HTC devices from the Google Play Store).
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Pro Built-in image filters
HTC Gallery comes bundled with image filters that allow the user to add image effects to their images. Functions similar to Instagram filters.
Pro Offers interesting image effects
The app allows creating blended, kaleidoscopic or masked images.