Almost immediately after getting my hands on a Galaxy Tab 10.1, it was updated by Samsung to include the infamous TouchWiz UX. This brought about some significant aesthetic and UI changes, including a quick-access tray, which brings up a list of handy apps at the touch of a button. The only problem is that this bar isn't customizable. For those who want more options, or those not fortunate enough to have the TouchWiz experience, developer SnowBEE has released Wizz Bar.
Wizz Bar allows you to create a sort of mini app tray, fully customizable with the apps you use most.