JDiskReport  is a utility that analyses hard disk drives and collects several space statistics.
JDiskReport provides information to understand how much space the files and directories consume on your hard disk drives, and it helps to find obsolete files and folders.
JDiskReport is a free easy to use tool; with a couple of clicks you can retrieve all the space information of your files and directories on your hard disk drives.

Download: JDiskReport

Active@ Partition Manager is an application that helps you manage storage devices and the logical drives or partitions that they contain. You may create, delete, format and name partitions on your computer without shutting down the system. Most configuration changes take effect immediately.

Download: Active@ Partition Manager