Virtual Button Bar 2.9.4 free download

ROOT required for full functionality Menu, Back and Search are rooted-only buttons - all others work on non-rooted devices.

Emulates hardware keys (Home, Menu, Back etc) and overlays them on the screen, on top of all applications. Single-swipe action (see video):

Choose the number of buttons you want, position them
Lock Screen animations including Gingerbread-style TV off (requires 2.2)
Change button function (vol up/down, lock device, expand Notification Bar, Camera, Search)
Alt-Tab functionality
Change Button sizes and colour
Adjustable Transparency
Separate, independent configurations for portrait and landscape

A fully-featured but time-limited trial is available.

Perfect for Tablets including Nook Color or devices which lack hardware buttons.

Note:
This application uses Google's Licensing Library (LVL) which means your device must have Android Market installed and periodically connect to the internet.

To uninstall:
If you've enabled Device Administration for the lockscreen, you need to disable it before uninstalling. Uncheck the permission in-app or go to Settings -> Location and Security -> Select device administrators and uncheck Virtual Button Bar.

What's in this version: (Updated : Oct 7, 2012)

Added option to disable foreground service. Uncheck to dismiss the permanent notification in 4.3+ but have higher chance of app being closed at low memory

Required Android O/S : 2.1+

Screenshots :