In 888Poker you have:
-Level
freerolls (If you already play Money);
-Cardschat Freerolls and other password-restricted freerolls (Jackpot, Twitch Channel's Freerolls, etc).
You can search in google for the passwords, most are them don't have any requisites, you just need to access (for example) a facebook page to have the password.