- XCallbackURL: Open source testing app for iPhone. The code in this project demonstrates how to construct an outgoing x-callback-url, and also registers the “xcallback://” URL scheme and demostrates how to receive incoming URLs in your application
- TiXCallbackURL: Same sample testing app as above, but implemented using Appcelerator Titanium. To avoid conflict, this app registers the “tixcallbackurl://” URL scheme.
- Inter-App Communication: “Inter-App Communication, IAC from now on, is a framework that allows your iOS app to communicate, very easily, with other iOS apps installed in the device that supports the x-callback-url protocol. With IAC you can also add an x-callback-url API to your app in a very easy and intuitive way.”