TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
IQDB - Multi-service image search
SauceNAO - SauceNAO is a reverse image search engine.
NooBox - NooBox is a Chrome Extension that provides useful functions, such as: Multi-engine Reverse image search, Extract Images, Screenshot & Search
CamFind - CamFind is the very first mobile application that can photograph, identify, and provide information...
Google Lens - Discover information about something by taking a photo