mlocate - Indexes filesystems allowing you to search for files.
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
fd - A simple, fast and user-friendly alternative to 'find'.
SearchMyFiles - Alternative to the standard Search For Files And Folders module of Windows. Duplicates search is also supported.
NTFS-Search - This tool enables users to search their NTFS formatted harddrives within seconds.
SMF – Search my Files - SMF - Search my Files v13 is the fastest duplicate files finder and a multi-dimensional - file searcher, - file copier / mover, - file deleter / eraser, - and