Duplicate Files Finder
Duplicate Files Finder is a free open source program for Windows which finds duplicate files on your computer so you can delete them and save space. The program hasn't been updated in many years, but it does pretty much everything you'd want it to do. There are similar programs available, some with better interfaces, but most of them are bundled with adware, so, I prefer this one. Its features include:
- You can include as many drives or folders as you like in your comparison.
- Compares file's contents, but only as much as needed for faster processing.
- Supports white lists and black lists for file names, extensions, and file sizes.
- Store the report to a file for later processing.
- Has both a UI and command line program.
The program hasn't been updated since 2008, so I'm making it available here for ease of downloading.