Zynga!

Zynga is a company that develops games that work both stand-alone on mobile phone platforms such as Apple iOS and Android and as application widgets on its website and social networking websites such as Facebook and Google+. Zynga's mission is 'Connecting the world through games.'
Zynga is mostly known for the creation of games such as FarmVille, CityVille, CastleVille, ChefVille, Mafia Wars and Words With Friends.
A lot of people wonder how Zynga makes its money, especially seeing as the games that they create, their business model is free-to-play. Zynga is supported in two ways, via credit card payments and partner businesses.
Farmville 2 is a sequel to Farmville and was released in September of 2012. It's available as an adbone flash application via the social networking website Facebook and Microsoft's MSN games. The game is a freemium game which means there's no cost to play however players have the option to purchase premium content.