Package gparted

Gnome Partition Editor

http://www.gparted.org

GParted stands for Gnome Partition Editor and is a graphical frontend to
libparted. Among other features it supports creating, resizing, moving
and copying of partitions. Also several (optional) filesystem tools provide
support for filesystems not included in libparted. These optional packages
will be detected at runtime and don't require a rebuild of GParted

System Administration (Section 8)
gparted
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...