DrawerForm is just a sample project showing how to implement a Facebook-style UI for your Delphi XE4/XE5 iOS and Android applications. By Facebook-style, I mean where the main content area slides over to the right exposing a Drawer of content on the left. This can be triggered either by the "Hamburger" button in the toolbar, or by swiping left/right on the toolbar.
For more info, see the blog post at http://www.malcolmgroves.com/blog/?p=1352