NoDupe 2.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free program is a product of OTIS Soft. We recommend checking the downloaded files with any free antivirus. The program is included in System Utilities.
From the developer:
NoDupe is a free duplicate file finder for windows. The program is very small and runs on any computer. The application is programmed to compare each bit of similar files to confirm whether they are identical or not. While this approach would seem to take a lot of time, the developer says it is faster than any other program.
You may want to check out more software, such as Direct Access, AmoK DelayDel or DoubleKiller Pro, which might be related to NoDupe.