It's less familiar than 8ball pool, but 9ball is one of the most exciting pool games you can play.
It is played with only 9 object balls. The object of 9ball is to pocket the 9-ball. On each shot, the the cue ball must first contact the lowest numbered ball on the table, but the balls need not be pocketed in order. The player who pockets the 9-ball wins the game and a player who've committed 3 consecutive fouls loses the game.
If you want to practice playing 9ball online, there are some good news for you. Play89 has added 9ball pool game to its pool software. To download the 9ball pool game and play online 24/7 click here