Sites sharing network:
The iPoker Network is currently the largest of the online poker networks, although this in itself doesn't mean that it's the best. However, it definitely is among the very best, and while there are some players who prefer another network, it's never really by that much, and a lot of this is a matter of personal preference.
Not only is the iPoker Network the biggest, it's also currently the third most popular place in the world to play online poker, behind only Poker Stars and Full Tilt. If you crave the best competition out there to look to improve your game, those two other sites definitely have all the toughness you can handle. If you instead want to make as much money as you can, iPoker and the other networks on this list are a much better way to go.
The major sites on the iPoker Network are such well known brands as William Hill, PaddyPower, Bet365 and Titan Poker.