NetShred X for Mac

From Mireth Technology:

Clear Cache, erase History permanently with NetShred X, the easy-to-use internet track eraser for Mac OS X that securely erases cached files your browser and email programs leave behind. NetShred X is the internet privacy software that is easy, fast and cleaner. Easy because it runs automatically - you don't have to remember to use it. Fast because it runs in the background - you don't have to wait for it. Cleaner because it will erase, not just delete all internet tracks for almost every browser and email program on Mac OS X. Your web browser stores copies of the images and text that you see in on your hard drive. Anyone with access to your computer can look through these files and see what information you have accessed on the web. These internet tracks - browser cache, history, download cache, quicktime cache, favicons and email cache, trash, spam and junk mail - not only potentially compromise your privacy, they also take up a lot of disk space. Clearing your cache, throwing these files in the trash, or deleting them will not remove the file contents from the hard drive - it just removes the file name from the directory, leaving the data intact and recoverable. To dispose of these internet tracks, use an internet track eraser to erase them so they CAN'T be recovered.