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.
Easy Screen OCR - Easy Screen OCR helps users capture screenshot and grab text from images.
ksnip - Ksnip is a Qt based cross-platform screenshot tool that provides many annotation features for your screenshots. - DamirPorobic/ksnip
ABBYY Screenshot Reader - ABBYY Screenshot Reader turns text within any image captured from your screen into an editable format without retyping
PDF Reader Pro - PDF Reader Pro is an all-in-one PDF office supporting to Read, Annotate, Edit, OCR, Convert, Create & Fill Form, Sign PDFs, TTS on Mac, iOS, Android, and Windows.