AllDup is a Free Portable Duplicate File Finder created by Michael Thummerer Software Design. AllDup can be used to detect and remove duplicate files on any given drive or folder. Duplicates can be sorted by; Name, Extension, Size, Content, Modification or Creation Date, Attributes and Links. Results can also be exported or printed. This tool can be particularly useful if you have multiple Music, Pictures, Videos, or Downloads that you would like to sort for duplicate content.