OmniDiskSweeper

View your files
When you start OmniDiskSweeper, it presents you with a list of disks attached to your machine. Double-click on one, and a new window opens with a column view listing every folder and file you can access, which it sorts by size as you watch.

Clean house
The free space on the disk and the ordering of the folders are automatically recalculated as you delete the old, space-hogging stuff you don't need anymore.

Smarter than Finder
Sure, you could do this with the Finder, but OmniDiskSweeper makes it easier. Since the directories and files are sorted by size, you get to quickly zoom in on the big files that are taking up all the space

• Fixed a common crash on OS X 10.9 Mavericks.
• More Responsive: OmniDiskSweeper is much more responsive when scanning a slow disk. (The interface used to block while scanning the list of files contained in a folder, which could cause very long pauses when scanning slow disks.)
• Faster Scans of Remote Disks: Switched to scanning directory contents using API that only collects the small set of attributes that OmniDiskSweeper is actually going to use, so it can scan remote disks much more quickly.
• Smarter Scan Order: Rather than scanning a directory to completion before starting on any other directories, OmniDiskSweeper will automatically skip between folders so you can more quickly get a sense of how big each directory is relative to the others.