With File Shredder you can remove files from your hard drive without fear they could be recovered.

Schedule file rename and delete commands for the next reboot. This can be useful for cleaning stubborn or in-use malware files.

Wish you could quickly defragment your frequently used files? Use Contig to optimize individual files, or to create new files that are contiguous.

CacheSet is a program that allows you to control the Cache Manager's working set size using functions provided by NT. It's compatible with all versions of NT and full source code is provided.

Net.MD5 is a handy MD5 checker and generator. It can encode unlimited bytes of data into 32bit key, and auto compare against original key. A visual GUI will keep MD5 more friendlier. It was written in C# under .NET Framework 2.0

cfv is a utility to both test and create .sfv(Simple File Verify), .csv, .crc, md5sum, bsd md5, sha1sum, and .torrent files. cfv also includes test-only .par and .par2 support. These are commonly used to ensure the correct retrieval or storage of data.

FileMon monitors and displays file system activity on a system in real-time. Its advanced capabilities make it a powerful tool for exploring the way Windows works, seeing how applications use the files and DLLs, or tracking down problems in system or application file configurations. Filemon's timestamping feature will show you precisely when every open, read, write or delete, happens, and its status column tells you the outcome. FileMon is so easy to use that you'll be an expert within minutes. It begins monitoring when you start it, and its output window can be saved to a file for off-line viewing. It has full search capability, and if you find that you're getting information overload, simply set up one or more filters.

Disk Cleaner is a free open source tool to quickly and easily clean your hard disk from temporary files like those in the system temporary folder, the Internet Explorer Cache and Cookies folder, and the Recycle Bin.