Hard Disk Manager, from Paragon Software, is undoubtedly the most complete disk-management solution I've seen. It's clear that Paragon has used everything they learned from the other utilities they create to produce a package that addresses almost every conceivable issue that might arise in disk management.
Most utilities of this type can manage installations of OS X, some versions of Windows, or various flavors of Linux; Hard Disk Manager can handle them all, and provides backup and restoration functionality as well. And Hard Disk Manager can work with all types of drives, from the expected hard disks to thumb (flash) drives. It can even format and partition, as well as backup and restore, FileVault and Fusion drives.
The utility relies heavily on contextual menus to access the various functions for physical disks and partitions, as well as for logical CoreStorage drives: creation, formatting, copying, and deletion of partitions; wiping--or shredding--of data or free space; redistribution of free space between partitions; volume backup using Paragon's patent-pending Snapshot technology, which provides options such as selective file/folder restoration and incremental backups which can optionally be merged with a parent backup; recovery of deleted data; repair of Windows boot issues; migration of a Boot Camp installation from one Mac to another; and even revision of Windows installations to conform to new, possibly incompatible, hardware. And no change is made immediately: all activities are queued for review and submission, so you have an opportunity to revise your changes before you commit to them.
Though it may seem a small thing, I was impressed by the thought Paragon has put into the creation of this utility, providing an option to perform two extremely important functions for bootable partitions in one step: file-system-integrity check and scan-and-repair for bad disk sectors. I never could understand why creators of disk utilities forced you to perform two separate tasks to get this same result. And to "up the ante," Hard Disk Manager can perform these checks on currently booted volumes by "freezing" the OS while the checks are performed. This is facility and utility at its best. Paragon has provided incredible power at an extremely reasonable price, which equates to unparalleled value.