Ok, in case you didn't know, there's been a whole new generation of very good boardgames to come into existence in the last decade or so (often called "German" games). They aren't free, but you might still be interested.
Here's a short introduction to why German games are so great:
http://www.geocities.com/yahugaming/German.html
Here's a site with all the information in the world about all sorts of games, especially german games:
http://www.boardgamegeek.com
OK, but you say you *really* don't have any money? Here's a bunch of links to free print-and-play games:
http://boardgamegeek.com/geeklist.ph...ew&listid=7690