FSlint is a utility to find and clean various forms of unwanted/junk/lint files on your Ubuntu filesystem. For example, one form of unwanted files it finds is duplicate files, bad names, temporary files, files with bad symlinks, empty directory, and others.
To install:
sudo apt-get install fslint
Using Fslint:
If you want to open goto Applications—>System Tools—>FSlint
Screenshot: