Drive Genius 3 is a Mac optimization software that provides tools to speed up, clean up, and optimize Mac systems. It allows users to repair drive errors, edit drive sectors directly, and view detailed drive information. The software also monitors drive health, supports 64-bit systems, improves disk defragmentation, supports RAID configurations, resizes partitions, scans for bad blocks, sends email notifications, and includes tools to securely erase data, clone drives, and check drive integrity. A 30-day free trial is available on their website.