Intertops has a two daily freerolls with a maximum of 250 players. Each one awards 8 prizes, 5 tickets to the $1 $250 GTD R/A tourney on Saturday, 2 tickets to a $10 $250 GTD Bounty tourney on Fri, and 1 ticket to a $1K GTD tourney on Sun.
Registration opens 2 hours before start time. They usually take about 30-45 minutes to fill up, but I have seen it take less than 20 minutes for all the seats to be filled. Plan ahead and sign up early if you want to play. The play tends to be fairly donkish early on, but I guess that can be expected from a freeroll. If you can manage to last the first 45 min or so, the play tends to settle down a little, typical freeroll action. Good luck if you decide to play in them.
I actually used to prefer the larger freerolls on UB, with about 3500 players. The payout wasn't the greatest for a 4.5 hour time investment, but I really enjoyed the challenge. Being able to cash in them frequently and winning several, gave me a lot of confidence in my game.