iPhone Development: Any desktop-equiv frameworks to avoid?

FROM : Frederick C. Lee
DATE : Wed Apr 02 00:34:46 2008

Greetings:
    This is just a cursory question from a neophyte.

Are there any desktop-equivalent libraries/frameworks that are 
detrimental to iPhone development?
For example AppKit vs UIKit; or any particular libraries within the 
Foundation framework?

Any opinions/discussion would further clarify the iPhone-development 
environment.

Regards,

Ric.