TreeSize

TreeSize is a folder and disk analysis tool.

Features:

• It's very easy and intuitive to use : just drag folder and disk or open it
• It shows kinds of data in rainbow color so that you can see how much they are at one glance
• It shows classical tree structure so that you can easily navigate to where you want to go
• It shows the biggest 100 items and lets you pick them up and clean
• It shows all items in order of size, name or date
• You can check the content of file by Quick look panel
• You can see any file or folder in Finder by one click
• You can open any file with proper application by one click
• Added 'Open with TreeSize' in Service Menu