Useful Switchers - $1.99

Useful Switchers is an Android application that provides a quick toggle for frequently used system settings.

Included in the list of available features in version 0.7:

• GPS - enable/disable GPS
• Wi-Fi - enable/disable Wi-Fi
• Bluetooth - enable/disable Bluetooth
• Ringer mode - set ringer mode to silent, vibrate, on
• Battery level status - indicate current battery level
• Internal/SD card memory status - indicate how much internal or SD card memory is available
• Brightness adjustment - adjust screen brightness
• Airplane Mode - set phone on airplane mode
• Screen Timeout - set screen timeout
• Flashlight - set screen to maximum brightness to use phone as 'flashlight'
• Auto Sync - enable/disable auto sync to synchronize with Gmail, calendar, etc.
• 2G/3G - switch between 3G and 2G to save power
• Wireless Location - enable/disable Wireless Location feature
• Silent Mode - set phone on silent mode

For more information please visit http://androidforums.com/showthread.php?t=3043