Capture2text - Capture2Text enables users to quickly OCR a portion of the screen using a keyboard shortcut.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
TextSniper - Instantly extract any text from your Mac's screen
dpScreenOCR - Program to recognize text on screen
ksnip - Ksnip is a Qt based cross-platform screenshot tool that provides many annotation features for your screenshots. - DamirPorobic/ksnip
KanjiTomo - KanjiTomo is a OCR program for identifying Japanese text from images.