guess 2/3 of average: http://en.wikipedia.org/wiki/Guess_2/3_of_the_average
pirate game: http://en.wikipedia.org/wiki/Pirate_game
dollar auction: http://en.wikipedia.org/wiki/Dollar_auction
Most common/well-known:
prisoner dilemma: http://en.wikipedia.org/wiki/Prisoner%27s_dilemma
chicken: http://en.wikipedia.org/wiki/Game_of_chicken
battle of the sexes: http://en.wikipedia.org/wiki/Battle_of_the_sexes_(game_theor...
El Farol bar: http://en.wikipedia.org/wiki/El_Farol_bar_problem