Disk Cleaner is a free tool to quickly and easily free disk space that is used by temporary files like those in the system temporary folder, the Internet Explorer Cache and Cookies folder, and the Recycle Bin. It is a free and open source clean disk application that's light on system resources, well-designed and easy-to-use.
Here are some screenshots to illustrate the features and user interface of this application:
CCleaner
CCleaner Portable
HD Cleaner
HDCleaner
WinTools Professional