DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Scherlokk - Mac OS X application. Simple and user friendly, Scherlokk will find your media and missed files - quickly.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
Tembo - Tembo: Easy and Effective Searching
Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.
Listary - Listary is a revolutionary search utility for Windows