When we launched our Lifehacker Top 10 series back in March we had no idea what a big hit it would be. That Letterman guy’s really onto something! While we’re milking this whole “best of 2007 list” thing, we compiled the top 20 most-viewed Lifehacker Top 10 lists of 2007.

• Top 10 iPhone Applications
• Top 10 Free Windows Downloads
• Top 10 USB Thumb Drive Tricks
• Top 10 Free Computer System Recovery Tools
• Top 10 Wi-Fi Boosts, Tweaks and Apps
• Top 10 Free Video Rippers, Encoders, and Converters
• Top 10 Free Wallpaper, Fonts and Icon Sources
• Top 10 Body Hacks
• Top 10 Ways to Sleep Smarter and Better
• Top 10 Google Products You Forgot All About
• Top 10 Must-have Firefox Extensions
• Top 10 Ubuntu Applications
• Top 10 Ways to Clean Up Your PC
• Top 10 Mac OS X Tweaks
• Top 10 DIY Office Projects
• Top 10 Free Mac Downloads
• Top 10 Food and Drink Hacks
• Top 10 New and Improved Apps of 2007
• Top 10 Home Networking Tricks
• Top 10 PDF Tricks

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