GParted is an open source partition manager also known as the Gnome Partition Editor application. It is actualy a LiveCD/LiveUSB that allows you to boot directly into GParted when you need it - independent of the operating system you run.
The main task of GParted is to allow managing partitions without destroying the content already on them. GParted support the following filesystems: ext2, ext2, fat, fat16, fat32, ntfs, hfs, hfs+, ufs, xfs, reiserfs, reiser4, jfs and linux-swap.
GParted is the Gnome Partition Editor application. Before attempting to use it, here is some basic background information.
A hard disk is usually subdivided into one or more partitions. These partitions are normally not re-sizable (making one smaller and the adjacent one larger). The purpose of GParted is to allow the individual to take a hard disk and change the partition organization therein, while preserving the partition contents.