SplitView like Facebook app on iPhone
Facebook guys have done brilliant job in the new version of the app. The similar open source code can be found from here - JTRevealSidebarDemo. Please note that as of June 2014, this project has been discontinued, so you'll probably have better luck with a project from the list below.
It reveals technique behind doing split view for iPhone.
Edit: Few other open source codes:
How about projects with storyboard compatibility?I found 1 more slide menu which is compatible with storyboards:SASlideMenu
Another storyboard-compatible menu is ECSlidingViewController and ViewDeckfrom Sagar's answer. They both have storyboard examples (for the last one link is ViewDeckStoryboardExample)
For anyone else looking for an Android version, take a look at: