Is it possible to transfer my stuff from an iPhone to an android?

I'm going to get a Samsung but basically all my stuff is on an iPhone. Music, Games, picture etc.
Can I transfer my games or do I have to buy them again?

You have to buy apps/games again. IDevices run.ipa apps, Androids run.apk apps. They are not interchangeable. Music you can transfer. Photos you can probably transfer. Even contacts you can probably transfer.