Double File Finder

As the name implies, Double File Finder is a program designed to help you locate duplicate files on your computer. By deleting them, you can free up space on your hard drive.
The interface of the application is based on a wizard, so navigating shouldn't be a problem, even for inexperienced users.
So, you can get started by specifying the folder you want to scan; it is possible to add multiple locations into the list, as well as make Double File Finder take subdirectories into account.
In the following step, you can establish a file filter between audio, compressed files, documents, images, system files, text, video, or all. Once again, you can insert multiple filters.
After the scanning procedure is done, Double File Finder allows you to pick the course of action between several options. For example, you can send files to Recycle Bin, shred them, or delete them and create shortcuts, as well as point to an alternative folder to copy the items.
The program runs on a low amount of CPU and system memory, and finishes a task in reasonable time, depending on the size of your hard drive. No error dialogs have been displayed throughout our evaluation and Double File Finder did not freeze or crash.
On the downside, the app does not come with additional configuration settings (e.g. make Double File Finder trigger a sound notification when the scanning job is done). Plus, the tool pops up an alert dialog every time it encounters a file which cannot be deleted (e.g. currently in use), thus interrupting the user's activity on the computer. No recent updates have been made to Double File Finder.