Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Tesseract - Tesseract is an optical character recognition engine for various operating systems
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Prizmo - Prizmo is a scanning application for Mac with Optical Character Recognition (OCR) in over 40 languages with powerful editing capability, text-to-speech, and iCloud support.
Plivo - Plivo simplifies your customer engagement.
Onlineocr.net - Free Online OCR service allows you to convert PDF document to MS Word file, scanned images to editable text formats and extract text from JPEG/TIFF/BMP files