Parted Magic
Commercial
Parted Magic is a commercial Linux distribution with disk partitioning and data recovery tools, Backup and Restore sold as a Linux-based bootable disk.
GNU Parted
Open Source
GNU Parted (PARTition EDitor) is a free partition editor, used for creating and deleting partitions.
gnome-disk-utility
Open Source
Disks (gnome-disk-utility or GNOME Disks or palimpsest) is a udisks graphical front-end included in the gnome-disk-utility package.
GNU fdisk
Open Source
GNU fdisk provides alternatives popular commandline programs.
Compare GParted with alternatives
Compare Parted Magic and GParted and decide which is most suitable for you.
Compare gnome-disk-utility and GParted and decide which is most suitable for you.