Free and Pro versions available.

Free version:

Scans directories and drives to find out the useless and larger files.
Diagram of a flower show in the form of free disk space
Browse/open/delete files on ringschart
Preview a picture on ringschart
Support for Unicode
Save scan history
Network path support
Full compatibility with 32 and 64 bit Windows

Disk Space Fan Demo Link: Disk Space Demo Video

Download Disk Space Fan: Disk Space Fan - Download disk space management software