TrueCrypt - free open-source disk encryption
TrueCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux.
http://www.truecrypt.org

SourceStyler C++
A tool for C/C++ developers that provides complete control over the formatting and layout of C/C++ source code. Provides over 75 individual formatting options and full ANSI C++ support. [Shareware]
http://www.ochresoftware.com/

The Software Company
Specializing in data-enrichment tools for address verification, address validation, gender coding.
http://www.softwarecompany.com/

DiskView
A disk management software that graphically shows disk space usage, file fragmentation and hard disk health based on S.M.A.R.T. technology - within Windows Explorer.
http://www.diskview.com

ZipSlack
Zip disk size (100 MB) Slackware, uses UMSDOS filesystem; for users with little hard disk space, slow Internet service to download a full distribution, or who want distribution to carry around on one Zip disk.
http://www.slackware.com/zipslack/

AppleScript Formatting
Fine Macintosh Software
http://www.merzwaren.com/snippets/index.html

Disk Checker 2000
RS Software Lab Home Site. Disk Checker is a program for scanning disk surface,files, folders for errors and working with disk image.
http://www.rssoftlab.com/

Gibraltar
Gibraltar Firewall. Professional Corporate Security Gateways. UTM-Appliance. Router, Firewall, Proxy-Server, VPN-Gateway, Antivirus, Antispam.
http://www.gibraltar.at

PartEd
GNU (Free Software Foundation) program to create, destroy, resize and copy PC disk partitions. It currently supports ext2 and FAT (FAT16 and FAT32) filesystems, Linux swap devices, and MS-DOS disk labels. GNU/Linux or on boot disk, open source.
http://www.gnu.org/software/parted/

LDE - The Linux Disk Editor
Disk editor for Linux, originally written to help recover deleted files. It has a simple ncurses interface that resembles an old version of Norton Disk Edit for DOS.
http://lde.sourceforge.net/