For simple resizing of your existing Windows partition, Norm has done a good job in showing you how to get it done with Easus. If you want to do more, such as creating new partitions of different file format (such as Ext3 or HFS), then Gnome Partition Editor (Gparted) is the one for you.

GParted (Gnome Partition Editor) is a wonderful open source application that will allow you to easily work with the partitions of your HD. You can add, delete, resize, copy, and move partitions all with an easy interface.

Gparted is a GTK (Gnome)-based partition manager that can also be used with KDE. This utility works best as a LiveCD. Download the Gparted .ISO image here. Burn the .ISO image to CD. Use the GParted LiveCD as your partition manager. You can also install the package:

A physical disk device can be subdivided into one or more partitions on which the operating system can read and write data. GParted enables you to change the partition organization on a disk device while preserving the contents of the partitions.

Backing up partitions and hard disks sounds like work -- until you've tried Clonezilla. With Clonezilla you can clone and duplicate partitions of various formats and disks of various sizes locally or over the network. Even more impressive is the fact that you can do all this without typing complicated commands.

GParted is an excellent GNOME program for editing partitions, changing file-systems, and performing related disk tasks. However, GParted is not exactly the ideal program for new Linux users to familiarize themselves with if all they want to do is format a USB drive or external storage device.

The sixth update to the 1.5.x branch of the SystemRescueCd features a number of updates and package changes, including the latest major GNOME Partition Editor 0.6.0 update

Good graphical interface to manage your partitions, re size them, delete them or create them.

Partitioning your hard drives is rarely a fun business and oftentimes can be a real pain to do. Thankfully, it’s a lot easier than it used to be to slice up and mess around with your drive, which is only helped by the fact that nowadays we have graphical applications for this sort of task.