Are there apps that let you code ON the iPhone (not FOR the iphone)?

I'm just wondering if anybody knows of any simple IDEs or interpreters or anything that lets you play around with code开发者_开发知识库 on your iPhone.

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Mides IDE: lets you make php based web aplications ON THE IPHONE http://www.owensperformance.com/mides/

Interface: Lets you make IPHONE APPS (without coding) ON THE IPHONE

ICode: The same as "Interface" but with coding.

If you are interested in one of them just type the name of the app in itunes. :)

DD