duplicate file finder and remover
Download from PortableApps.com
Duplicate Files Finder Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
Duplicate Files Finder is an application which searches for duplicate files (files which have the same content, but not necessarily the same name) and lets the user remove duplicate files, either by deleting them or by creating links. The search is very fast compared to other similiar programs which use hashing algorithms.