Well, there is Epetsite, but it's not as good(not in a long shot). Although many people say it's possible to make a virtual pet site with freewebs, it's not possible at all, I've tried. I know vpetsite is under construction and people can't sign up there until V3 is done, I'm planning to wait until the construction is finished to sign up. If you have an existing user you can log in. You should try searching on Yahoo! Answers.
Hope I helped :)
imvu,buildabearville.com,weeworld,are a few sites sort of like zwinky.
bebo,anamiros.com
I like zeemfo.com
SwapPocket.com
Here are some sites you may like: weeworld.com clubpenguin.com fantage.com(My favorite) moshimonsters.com
Tourism sites are found around the world. Some sites are: Natural sites like the Grand Canyon in the U.S., mountains in various countries in the world, etc. Man-made sites like the Eiffel Tower in Paris, Big Ben in the UK, Great Wall of China, etc. Recreational sites like tropical beaches, mountains for skiing, etc. Historical sites and many others.
Some sites like bananahobby.com , horizonhobby.com, and hobbyking.com are good sites.
cliffnotes and gradesaver enotes
I personaly like www.foodnetwork.com and www.allrecipies.com
lol limewire in google :)
smartpunk.com
Yeah, there are some, like moola.com and irazoo.com.