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.
CamFind - CamFind is the very first mobile application that can photograph, identify, and provide information...
KartOO - KartOO ranks among the most powerful Meta search engines.
Google Lens - Discover information about something by taking a photo