Print-and-play games are a recent phenomenon. They are tabletop games, usually free, that can be downloaded, printed out, and played. At the time of this writing, there are 3,580 print-and-play games available on BoardGameGeek, with more being added every day.
Some designers worry that giving a game away for free will eliminate the its commercial potential. While that is not an unreasonable concern, a free print-and-play distribution can gain exposure for the game and its designer and build an audience for a commercial version of the game. Coin Age and Tiny Epic Kingdoms are both small, free print-and-play games that both went on to be sold very successfully through Kickstarter campaigns, raising $65,195 and $286,972 respectively.
In addition to BoardGameGeek’s huge repository of print & play games, Cheapass Games have made much of their back catalog of retail games available as free print & play games. You can also access free-to-play games (many of which are print & play) in Fun Mines’s collection of tabletop games.