spaCy - spaCy is a library for advanced natural language processing in Python and Cython.
Tesseract - Tesseract is an optical character recognition engine for various operating systems
monkeylearn - Text Mining Made Easy. Extract and classify information from text. Integrate with your App within minutes.
GOCR - GOCR homepage. GOCR is an OCR (Optical Character Recognition) program, developed under the GNU Public License.
Google Cloud Natural Language API - Natural language API using Google machine learning
TextGrabber - Office & Productivity