iOS 5 introduced Notification Center Widgets and I would like to experiment with those widgets and make custom ones (with a Jailbroken device). I couldn\'t quite figure out how
OK i think i have found a good way to understand it, a sample widget with full source code available on github: https://github.com/WillFour20/WeeAppTest But whats most helpful is this tutorial and the NIC template for theos mentioned in the tutorial, I already made several widgets using this method and my custom NIC templates. http://weeplugins.com/blog/?p=1
I don't want to shameless-plug in here, but I wrote a small tutorial to help you with this.
How to write Notification Center Widgets for iOS (iOS 6 and Below)
Hope it helps you!
UPDATE
Please note this is for iOS widgets running iOS 6 and below - In other words, this is for old jailbreak development. I may write an iOS 8 tutorial eventually, but this one is not it.