iPhone sdk apps without jailbreak?

Is there any way to run apps made with the iphone sdk without jailbreaking?

I own a iphone 3gs and I want to tether it. Any possible way to do it w/o jailbreak?

Is there a way to get the iPhone SDK for windows? I dont have a mac and I really want to develop my own apps. Can anybody help?

Does jailbreaking my iphone could damaged it? Can I get it back to the original way?

There are many sites which provide iphone app service. But i want to best iphone app service at low cost.

Does anyone know the best apps for iPhone 4S that begin with M? I heard their are aps related to magic tricks? Like for fun l...

I have an iphone and I've downloaded a lot of apps but some of the apps I want it wont allow me to get. when I do try to down...

Can anyone on here tell me how to jailbreak my iphone? I have firmware 1.2.0 (software 2.0) 3G can anyone help me please?

I see their is such thing as a see through camera app that almost looks real but its not on the iPhone. Do they really exist ...

I want to buy the sims 3 for my iPad, but there isn't an app available for iPad. So I might buy the iPhone version.. Will it ...