http://www.valleyofunicorns.com/
Valley of Unicorns is probably my second favorite adoptables site (since this one comes first hehe).
It's a pet adoptables based on adopting horse like creatures: unicorns, pegasi, alicorns, spring fairies, and also some more elusive paaefarins, heraldic unicorns and fakiecorns.
You can get eggs at any time from the 'Basket', where you can find eggs ranging from very common to very rare. Eggs need clicks to grow into foals and eventually horses! Each click on a growing egg or foal gives you coins, which you can use to buy other egg colors from the Silver Shop. And of course, like the Bazaar here, there's a Gold Shop there as well!
The best part about VoU (valleyofunicorns) is the events! There are a lot of events in which you can get limited edition colors! Events happen in periods like Christmas and Valentines Day, but there are also monthly egg releases! There's even the opportunity to submit your own artwork using PSDs you can download!
So who here plays?