Well, if you play on paddy power, probably you are not an US player so you have a lot of option. This is the one I know:
- Entraction Network: 24hpoker (a lot of daily freerolls, one is of €500), doxxbet (some small freerolls) and goplay poker (some small freerolls).
- Microgaming: 32Red Poker (free sit'gos all day) and unibet
(€100 daily freerolls).
- Ongame: Betsson Poker have $250 daily freerolls.
- Everest Poker (free sit'gos all day)
Ipoker network have a lot of good freeroll too! If you have time, you can make a good money playing those freerolls.