Source : Free On-Line Dictionary of Computing

guiltware
     
        /gilt'weir/ 1. A piece of {freeware} decorated with a message
        telling one how long and hard the author worked on it and
        intimating that one is a no-good freeloader if one does not
        immediately send the poor suffering martyr gobs of money.
     
        2. {Shareware} that works.
     
        [{Jargon File}]