know what's on your drive WinDirStat Portable is a disk usage analyzer and cleanup tool packaged as a portable app, so you can see exactly what's on your device or a host computer's hard drive and easily free up space. Features

Avira AntiVir Premium description Advanced protection against viruses, malware, adware, spyware, phishing.

A tool to help you keep away from viruses. No Autorun is an easy to use application that blocks virus in USB flash / disk from auto-running.

Many of you have been contacting us with questions about Apple's recently announced iBooks for iPad. We have no involvement, but we are proud to have influenced the future user interface of digital reading.

Senator Sam Ervin pulled one out of his pocket during the Watergate Hearings... Now prepare to own any legal debate with a copy of the US Constitution on your iPhone or iPod Touch!

Join the more than 1,000,000 people who have used Audiobooks to listen to over 2,800 classic audiobooks totally FREE.

winMd5Sum Portable is a simple MD5 sum checker that allows you to check and compare the md5 sums of files. It's portable, easy-to-use and quickly installs into the PortableApps.com Menu. Features

WinMerge Portable is the popular WinMerge differencing tool packaged with a PortableApps.com Launcher as a portable app, so you can compare files on the go. It has all the same great features as WinMerge including syntax highlighting, patch file generation and more.

Xenon File Manager Portable is a file manager packaged as a portable app so you can open files easily wherever you go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

A fast multi-track audio editor and recorder for Linux, BSD, Mac OS, and Windows. Supports WAV, AIFF, Ogg, and MP3 formats. Features include envelope editing, mixing, built-in effects and plug-ins, all with unlimited undo. Audacity® is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.