DismissMyKeyboard is a tweak that allows you to do exactly what it says; dismiss your keyboard in situations where you can't. The iPad has a dismiss button, but the iPhone doesn't, and in certain apps (like the Notes app) there is no way of dismissing your keyboard. This tweak aims to change that by allowing you to dismiss it by swiping from the spacebar to the return bar. There are no options to configure.

This tweak is available for free from the BigBoss repo.