Disk Drill is available in a Free/Basic version and a Pro version for $89.
Disk Drill is a Mac data recovery software designed natively for Mac OS: easily protect your files from accidental deletion with Recovery Vault and recover lost data from Mac disks. When something is deleted Recovery Vault makes it possible to recover not only the file itself, but also its properties, such as original file name, location, etc. So you will always be able to recover data from Mac files system (HFS/HFS+) and FAT32 partitions. Disk Drill also includes
- Deep Scan: new signature of .afdesign for Affinity Designer documents recovery
- Data Recovery: refactoring of data caching for all recovery methods
- UI: minor user interface improvements
- Performance: internal memory usage optimizations
- OS X 10.6.8 or later