Apparently JOCR requires Microsoft Office 2003 or 2007 and won't work with Office 2010 (unless you also have an older version and do some tweaking). 
JOCR enables you to capture the image on the screen and convert the captured image to text.
JOCR enables you to copy text from any files and images on the screen such as protected Web pages, PDF files, error messages.
The program offers several capture modes.
For MS Office 2003 (and maybe 2007): If JCOR does not work, please manually install "Micorosoft Office Document Imaging" (MODI) that is included in the setup file of Microsoft Office. You can find MODI under "Office Tools" of the setup file.
The recognizable languages by MODI and JOCR are, in the alphabetical order, Chinese, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish. Confirm your available language by executing "Microsoft Office > Microsoft Office Tools > Microsoft Office Document Imaging" and selecting "Tools > Options > OCR tab > OCR Language".
Jing and GreenShot have no OCR text recognition function from screenshots. On http://www.faststone.org/FSCaptureDetail.htm there is no information, that FastStone Capture has an OCR-function although it is not free. If you need a free portable OCR text recognition app, you need [JOCR](http://alternativeto.net/software/jocr/). JOCR has the ability to recognize selectable many languages, the user interface however is only english. If you have the commercial ABBYY Finereader you have as a free add-on the ABBYY ScreenShot reader, which is very good, but is not free and not portable.