AfterFocus is a photo editing application for Android that brings DSLR-like effects to your photos.
Panorama 360 is both a camera app for taking 360 degree photos and a social network that inspires you to visit places and allows you to share your work with a community.
Night Vision Spy Camera is an Android app that lets you take pictures at night in very low light.
InstaPicFrame for Instagram is a photo app that lets you create collages.
Screen Filter is a handy, free app only available for Android that belongs to the category MP3 & Multimedia Apps with subcategory Images.
Photobucket is a popular online service for sharing photos and downloading images from other users.