What are some alternatives?
When comparing Everything and X1 Search, you can also consider the following products
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.
RecentX - RecentX is an innovative launcher that gives you instant access to your files, folders, programs...
Archivarius 3000 - Archivarius 3000 is a full-featured application to search documents and e-mail on the desktop...
Locate32 - Locate32 is software which can be used to find files from your harddrives and other locations.
FSearch - A fast file search utility for GNU/Linux based on GTK+3