Windows only: Piriform has finally updated our favourite Windows maintenance tool, bringing a bunch of big changes with the same user-friendly interface.
Most notable among the changes are the new 64-bit native EXE designed for those of you running 64-bit versions of Windows, as well as a new Drive Wiper tool that safely and securely erases your hard drive. They've also improved IE9 and Google Chrome support, as well as added improvements to HTML5 database cleaning for all those modern web apps. It also sports a pretty neat feature that intelligently decides which cookies you probably want to keep (singling out sites like Google, Yahoo and others) so you don't erase useful information on your machine that eases web browsing.
In addition to the new features, it's also added support for a few popular applications, like AVG Antivirus, Audacity, LogMeIn Hamachi, BitTorrent and others. For the full list of changes, check out the version history page, and be sure to avoid the hassle of running it by setting a CCleaner schedule.
CCleaner 3.0 is a free download for Windows machines only.