Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
SearchMyFiles - Alternative to the standard Search For Files And Folders module of Windows. Duplicates search is also supported.
ANGRYsearch - Instant file search, showing results as you type.
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
SwiftSearch - SwiftSearch is a lightweight program whose purpose is to help you quickly find the files you need...
DocFetcher - DocFetcher is a portable German/English open source desktop search application.