I have done multiple projects such as a Joke Database where people can browse jokes, and contribute their own. I have also made multiple php tile based MMORPGs such as Agland where you went around and planted trees and whittled things and built bases to protect your belongings etc., and also a much more popular game <a href="http://www.vampireparadise.com">Vampire Paradise</a> where you play a vampire with a thirst for blood. You can walk around and suck blood from other vampires or from humans, and get skill points and level up etc. as well as an inventory system and quests. However, I believe that they could have been much more popular had I had a better design for it.