Yandex.Images - search for images on the internet, search by image
QR Droid - QR Droid Zapper
TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
ZXing - Barcode Scanner for Android
SauceNAO - SauceNAO is a reverse image search engine.
UpCode - UpCode is a highly developed mobile access & interaction MAI technology that turns mobile...