NISE - The NISE Image Search Engine is a reverse image search engine (like tineye.
Tesseract - Tesseract is an optical character recognition engine for various operating systems
IQDB - Multi-service image search
ABBYY FineReader - ABBYY's latest PDF editor software, FineReader 16 you can easily convert files like PDF to Excel, PDF to Word, edit, share, collaborate & more with this PDF editor!
isk-daemon - isk-daemon is an open source database server capable of adding content-based (visual) image...
Google Lens - Discover information about something by taking a photo