TextCaptureX 

TextCaptureX is a COM library that allows screen text extraction in Windows applications. It is accessible from any COM aware programming languages.
text capture text capture api extract text screen text capture text capture library

Aqua Deskperience 

Copy/Paste unavailable?Aqua Deskperience extracts any text visible on the screen, in any application.Power features: screen capture, password recovery, color picker,smart link recognition.
capture text extract text text grabber screen capture password recovery show password desktop search search aggregation dictionary spell check translate notes

Grab Text 

The unique live text recognition software, built around fonts sampling technology, the one and only solution capable of converting virtually anything to editable text! Text capture module accepts information from HTML, PDF and graphics.
grab text grabber office capture character graphics pdf html dialogbox