OmniDiskSweeper is a Mac OS X utility developed by The Omni Group. It is designed to quickly and easily scan, analyze, and clean up hard drives. It scans the entire hard drive and displays the contents in a tree view. It can show the size of the files and folders in the hard drive, as well as the date they were last modified. Users can then delete files and folders they no longer need in order to free up space. OmniDiskSweeper also allows users to search for specific files, and provides secure deletion options. It can also identify large files that may not be necessary, allowing users to delete them and free up space.
Discontinued The program appears to be dead, as announced in a tweet from the author: https://twitter.com/bartheph/status/742596462807265280. The website and changelog appear to be abandoned. The latest version, 0.4.3, released at the end of 2015, can still be downloaded from the official website.