I am not responsible for damage caused by the misuse of this tool.
Here the web creator
www.UnlockRoot.com
UnlockRoot Tools is a android root tool. Support the Android 2.1,2.2 and 2.3,Easy way to get root access Permissions!
UnlockRoot is a great tool for Android that lets you easily access Root.
Unlock Root works on almost any device like the HTC Sensation, Desire S, Incredible S, Samsung Galaxy Nexus Note Galaxy, Galaxy S, Galaxy S2, LG Optimus One, Black, Optimus 3D and many more ...
You can view the list of supported devices
LIST OF SUPPORTED SMARTPHONES
check that the software version of your Android, matches the one listed (right column).
UnlockRoot How to use?
NOTE: Before you begin the process you have installed the drivers for your device on the PC
Only need:
-Your Android
-USB cable
-A computer running Windows.
-And your device on mode USB Debugging
To activate it you must go to Settings -> Applications -> Development -> and activate Check the box for USB debugging.
And the software, download it here:

Version:v2.2
Size:8MB
Date:12/31/2011
OS: WinXP/Vista/WIN7
Downloaded and proceed to install it.
Very easy to do this:
1、Your device must be in USB Debugging mode. To turn it on, go to Settings > Applications > Development and check the box.
2、Connect your device to your PC, Run UnlockRoot.exe,
3、Click “Unlock Root”, Enjoy!
Note:You need to install your device's driver on your pc before do this.
The Unlock Root tools interface:

Auto-Detection your devices:

Rooting your devices:

Install Power Saver to save the battery for you(Recommend):

After get ROOT Permissions,To take effect after restart the phone

After reboot your devices already have root access permissions
It's so easy, your smartphone with access to ROOT