The Silver Searcher - A code searching tool similar to ack, with a focus on speed.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
grep - grep is a command-line utility for searching plain-text data sets for lines matching a regular...
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
dnGREP - dnGrep allows you to search across files with easy-to-read results.
X1 Search - X1's Lightning-Fast Search Software. Premium Alternative to Windows Desktop and Outlook Search.