Capture2text - Capture2Text enables users to quickly OCR a portion of the screen using a keyboard shortcut.
Screenshot Tracker - Capture and keep track of full-sized web page screenshots
TextSniper - Instantly extract any text from your Mac's screen
Webshot - Free and Open Source screenshot website service
dpScreenOCR - Program to recognize text on screen
Screenstab - A tool to turn ordinary screenshots into beautiful image assets