BRM is just amazing. They have a HUGE selection of free poker bankroll offers that you can signup for. They cater to some of the largest sites such as Party Poker, BWIN and 888.
If you are new to the game, I recommend starting with this site. They will not only offer you free poker bankrolls for several poker sites, they will also help you get better at the game. This is great if you are trying to learn the game as a new player, or maybe you are just trying to get better at the game. AND you get free money !