In the non-developer forums, people who have no clue about the iPhone SDK or the art of software in general often suggest applications that are against SDK guidelines (downloaded game emulators, etc.), not supported by the public SDK APIs (enable wifi, video capture, etc.), not even supported by the hardware, or are still AI research topics. This thread is for more experienced developers to suggest applications that they think are possible, legal, maybe interesting, useful or even marketable (but that they aren't going to pursue or market themselves because it's not in their business plan, not their specialty, not enough time, etc.), and would like to see made. I would like to see an old-fashioned Morse code tutor (quizzes on alphabet groups, programmable WPM, etc.) Also, for the board game of Go, an iPhone game with a computer opponent (I assume it's possible because there are some available for PalmOS and WinMob devices with slower CPUs and less memory). Even a weak opponent might be suitable for absolute beginners. Since there is SDK supported read/write access to the contacts database, how about an app that can copy a note out of one contact and paste or append it to the note field in another contact? .