Capture2text - Capture2Text enables users to quickly OCR a portion of the screen using a keyboard shortcut.
JOCR - Apparently JOCR requires Microsoft Office 2003 or 2007 and won't work with Office 2010 (unless...
i2OCR - i2OCR is a free online Optical Character Recognition (OCR) that extracts text from images so that it can be edited, formatted, indexed, searched, or translated.
ABBYY Screenshot Reader - ABBYY Screenshot Reader turns text within any image captured from your screen into an editable format without retyping
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.