ptmax allows you to grow any primary partition in the partition table without any interaction with partition content. It does not move any partitions at all; it just changes the PT entry. It is useful for virtual machines (Xen/kvm) with resized block device and LVM inside.
VDT (Visual Disk Test) performs various I/O tests on files and devices such as whole hard disks, partitions, and logical volumes. It provides visual feedback on screen while offering a broad selection of addressing methods and test area selection.