There are a few, a site I tried after starting on Pokerstars was called Eurosport Bet and they had a £25 free-roll every night, now I know that £25 is not a lot but when you consider there were usually only 20 to 30 people playing in it the top prize was around £10 every night, I regularly finished in the money and created a
bankroll of over £150 in a matter of a few weeks just playing these free-rolls.
Another was PKR.com and the Tables were fantastic it was like being in an RPG game with your Avatar able to look around at other players at the table, Peek at their own Hold cards and Converse with other players, when you acted in a hand your Avatar would speak to the other players saying Raise, Call, Fold even All-in and if you wanted to upset someone your Avatar could call then a "Loser" but they went bust a few years ago and I thought I had lost another £150 bankroll, lucky for me Pokerstars bought the player database from the receivers and credited all the money back to the players.
When the fun Stops, STOP!