TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
SocialSeeking - Social Networks media search engine that searches user-generated content such as news, videos and...
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
PhotoSearch - Search Photos for hashtags and users. Browse and explore public Images.
Yandex.Images - search for images on the internet, search by image
Inflact Instagram Search - Inflact Instagram Search is a web-based tool that enables you to search the IG profiles of users by their bio and name and use the provided filters for exact and instant results.