These are terms used to describe methods of generating illegal software keys, in or to illegally obtain the use of the software without paying for it.
Many of these files may also contain trojan viruses, which can cause extensive damage to a computer, and are only named as such in order to get unsuspecting users to download them.
i thought my message below wasn't worded correctly. Who cares if i'm playin' w Limewire?
Seth

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic