GParted
Open Source
GParted is an open source disk partition software for creating, deleting and modifying disk 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.
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.
Compare Acronis Disk Director with alternatives
Compare GParted and Acronis Disk Director and decide which is most suitable for you.
Compare Parted Magic and Acronis Disk Director and decide which is most suitable for you.
Compare gnome-disk-utility and Acronis Disk Director and decide which is most suitable for you.