Gparted is one of the most popular partition editor in Ubuntu Linux,that you can create,reorganize,format partitions for your hard disk,or usb drive.
To install gparted is very easy,just run this command in terminal(Applications->Accessories->Terminal):

sudo apt-get install gparted

Now,you can launch Gparted from System->Administration->Partition Editor

Select drive in right top and all partitions lists in box,you can right click on one partition to organize.