Tesseract - Tesseract is an optical character recognition engine for various operating systems
Sketch Mirror - Preview your iOS designs directly on your devices
GOCR - GOCR homepage. GOCR is an OCR (Optical Character Recognition) program, developed under the GNU Public License.
Crystal: Sketch Mirror for Android - Crystal: Sketch Mirror for Android is an application that is designed for viewing your sketch designs in real-time, navigate prototypes and download content related to the sketches for offline viewing.
TextGrabber - Office & Productivity
Flowkit - Sketch library for user flows/content maps/annotations