Winamp's action drawer is easy to discover and use. Its graphical design clearly implies that it can be manipulated by touch.
Facebook app's new frontpage combines dashboard and action bar with action draw UI design pattern. Notifications part of the front page can be pulled up to display its contents.
ESPN app has a clearly marked action drawer. The arrow icon is a very clear clue how this UI component works.
Appsfire has implemented an interesting approach for solving their screen real estate problem. When pulling down on the app list an action bar comes into view.
Dolphin browser's bookmarks and extra actions are hidden on left and right sides of the main UI. Dragging the main UI reveals the controls.
Firefox for Android follows the same functional approach than Dolphin browser