disk checker

Disk space usage, free up disk space

Disk Editor is a free low level hexadecimal editor

Disk Defrag can defragment your disks and improve computer performance.

Disk encryption software for data security, privacy and protection.

Hide My disk can hide your hard disk (or hard disk partitions) simply clicking

A stand-alone multi-lingual spell checker for any Windows application.

MSDN article "Creating a Custom Spell-Checker with Word 2003 and Visual Basic

Mail Checker - Your mail box watch dog.

Freeware Spell Checker for windows clipboard!

The SEO Rank Checker is a nice little search engine.