diskmgmt.msc, first available in Windows 98.
GNU parted, this Windows tool will make perfect sense. You see immediately your list of hard drives, their partitions, and can click on them to delete or resize. Click on free space to partition. There are some limitations, though. For example, you can't delete recovery partitions. For that, you can drop to the Windows command line and run
diskpart. This tool is like Linux's