Darwin Wallet enables blind and visually impaired users to quickly recognize paper money. It uses the phone's camera to detect currency denominations for U.S., U.K., Canadian, European Union, and Australian bills. Simply hold the bill in front of the phone's camera, and the app will speak its value. The app uses the phone's camera and OpenCV (via Android NDK) to analyze and identify the currency image.
Open Camera is a camera app for Android phones and tablets. It has the option to auto-stabilize so your pictures are perfectly level no matter what. Other features include zoom (multi-touch and single-touch), flash, focus modes, focus and metering areas, face detection, front/back camera, scene modes, color effects, white balance, exposure compensation, video recording, timer, burst mode, geotagging, configurable volume keys, and choice of save folder. The preview's aspect ratio can be set to either match the display's aspect ratio or the aspect ratio of the photo/video resolution. The UI can be optimised for left or right-handed users.