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Linux: When you need to drill down deep into your files and folders to find something stored in the depths of your Linux-based operating system, open-source search tool Beagle is your best friend.

Linux only: Desktop search utility Catfish searches through your Linux desktop using the search engines already at your disposal—instead of installing yet another processor-intensive indexing engine.

Windows only: If you have a system search tool you prefer over Windows XP's default—the Hive Five on the topic would indicate many of you do—RerouteXPSearch makes your

By default, the latest version of Ubuntu comes with the Tracker search and indexing tool installed, enabled, and, as the How-To Geek points out, occasionally eating up some serious CPU cycles. Over at his blog, the Geek shows newcomers to Ubuntu (and other Linux distros with Tracker installed) how to scale back Tracker's needs, limit where it searches, or just uninstall the thing entirely.

Windows only: Free search app Agent Ransack is a tool worth checking out if you've got a file you just can't find with Windows' built-in search or other index-based apps, but you know a few details about it. That's because Agent Ransack, the "lite" version of File Locator Pro, helps you build regular expression searches for seriously complex filtering.

Last week's Hive Five Best Desktop Search Applications was a real barn burner, with Windows Search 4 (Windows) squeaking by with the victory just two votes ahead of Spotlight (Mac OS X) and 44

In a world where a search box puts the entire internet at your fingertips, it seems more pointless and inefficient than ever to drill down through your file structure when you're looking for a specific file on your hard drive. In the past few years we've seen a ton of desktop search applications designed to fill this need, but the question—as always—is: Which is best?

Windows only: Windows Search 4.0, an updated version of the desktop/web search tool that was introduced with Vista, is now officially available for Windows XP and Vista through Windows Update.