GParted, Gnome Partition Editor

GParted is the Gnome Partition Editor application that can be used to regulate and manage hard disk partitions. This application designed in the Live CD format. To use this tool, you first make the process of burning the contents of the file "GParted LiveCD files" into a piece of the CD. then boot using the CD.

as the official site say's :

The GParted application is the GNOME partition editor for creating, reorganizing, and deleting disk partitions.

A disk device can be subdivided into one or more partitions. The GParted application enables you to change the partition organization on a disk device while preserving the contents of the partitions.

With GParted you can accomplish the following tasks:
Create a partition table on a disk device.
Enable and disable partition flags such as boot and hidden.
Perform actions with partitions such as:
create or delete
resize or move
check
label
copy and paste

GParted uses GNU libparted to detect and manipulate devices and partition tables. Several optional file system tools provide support for file systems not included in libparted.

GParted is developed on GNU/Linux. It can be used on other operating systems, such as Windows, by booting from media containing GParted Live.

GParted is free and open source software available under the terms of the GNU General Public License

more info and download see the website at : http://gparted.sourceforge.net