Which data persistence options are available on the iPhone?

I know already:

Core Data开发者_运维百科, SQLite3, Property List Serialization, NSCoding with NSCoder (encode / decode)... what else?

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Another framework is BNRPersistence, which uses Tokyo Cabinet (I haven't tried it, so I don't know how good it is). Other than that, you can do pretty much anything you want--JSON or custom XML come to mind, but you can also use pretty much any C-based library.

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You listed the standard ones. Of course you've got access to a file system, so you can pretty much do anything. What are you looking for?