Ranked in these QuestionsQuestion Ranking
Pro Easy, straightforward use
GOCR is very easy to use and it's callable from the command line. Just type
gocr -h and you will have all the available commands with the needed information on how to use them.
Pro Can be used with different frontends
Since GOCR is compatible with multiple different frontends, it can be very easy to port it to different operating systems.
Con Couldn't OCR a clean pdf saved to file (containing images only), converted to pnm (GOCR native format)
Con Fails with multiline layouts
GOCR does not work very well with multiline layouts.