Been playing this game for a while : http://flightrising.com/index.php
Its a browser based world - game. You have a dragon clan and space for dragons where you can breed dragons for different genes and colours and gather food, trade items and dragons , do dragon battles etc.
Its pretty neat but the registration is currently limited and only opens now and then. This is their way of dealing with server load and slowly adding to the site.
Im Rumze on the site ( whod have thunk it ). Anyway , its a fun game that I visit every day for like 20 min and figured Id share it with folks.
http://rumze.tumblr.com/post/65984069360/having-my-second-batch-of-dragons-hatch-tomorrow