Tunes - Tuneflow

Windows only: Replacement file manager Double Explorer adds tabbed browsing and a dual-pane view for navigating your files, but unlike a full replacement application, it embeds a normal Windows Explorer screen into each pane.

Mac only: One convenient Windows feature missing in OS X is the ability to quickly create a new text file in the current folder. By simply dragging a small Applescript-turned-application to Finder's toolbar, this dream quickly becomes reality.

If you're in need of partitioning software or had been thinking about trying out Paragon Partition Manager, today is a great day to do so. The $40 software is available for free, today only.

Windows: If you've found yourself wishing that your flash drive had a recycle bin so that your portable apps and documents had the same safety net that your desktop files do, iBin brings recycle bin functionality to your flash drive.

Windows only: Organizing the eleventy-billion files you've got stuffed into folders on your hard drive is about as much fun as watching cheese go moldy. Freeware utility Digital Janitor automatically sorts your files by type and puts them where you want them.

Every week we pose a simple, focused question to the Lifehacker readership about a specific topic: Which is best? From netbooks and malware removal to home servers and wallpaper, here's a look back at the most popular Hive Five topics of 2009.

The control and shift keys have long been the imprecise means of selecting multiple items on a Windows system. The How-To Geek's blog away from Lifehacker reminds us that, as with Vista, Windows 7 users can use check boxes instead.

Windows: If you're on the hunt for which folder and files are chewing up the most hard drive space, Disktective is a free and portable app that makes short work of it.

Windows: Want to open certain files with the portable apps on your thumb drive when it's plugged in, but revert to default when it's not? Coffee (and, as we've learned, C.A.F.E.) makes those options possible.

Windows only: System cleaner application Clean Drive does only one thing, but handles it with ease—it searches for and deletes old files that you don't need anymore.