X1 Search - X1's Lightning-Fast Search Software. Premium Alternative to Windows Desktop and Outlook Search.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.
ANGRYsearch - Instant file search, showing results as you type.
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
XSearch - XSearch is a free search tool that with more features that Windows Search didn't provided.