The following are useful free file and disc data tools.

Eraser - An advanced security tool (for Windows), which allows you to completely remove sensitive data from your hard drive

My IP Address Tool - Find out what your IP adress is?

NT File Recovery - A free Windows utility to restore accidentally deleted files from NTFS file system.

TestDisk - Free utility for recovering lost or damaged partions on a harddrive. Supports: NTFS, FAT, FAT32, BeFS, BSD, CramFS, HFS, JFS, Ext2, Ext3, ReiserFS, Linux Swap, etc. TestDisk can run on DOS, Windows, Linux, BSD, SunOS and MacOS