From Eriban Software:
GrandPerspective is a small utility application for Mac OS X that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can easily spot which files and folders take up the most space. It uses a so called tree map for visualisation. Each file is shown as a rectangle with an area proportional to the file's size. Files in the same folder appear together, but their placement is otherwise arbitrary.
What's new in this version:
- Two new rescan commands: "Rescan folder in view" and "Rescan selected"
- The selection does not have to be locked anymore for the context menu to be available
- Optional detailed logging when scanning (for troubleshooting)
- After a rescan the focus can move down when it should