Stealth Recorder 

You can secretly record any sounds by real-time MP3 supporting Voice Activation System and transfer them automatically by email or FTP in perfect stealth mode. You can send your voice message to anybody by e-mail also.
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SpyArsenal.com Internet Spy 

Freeware utility that makes a chronological record of all Web sites visited from your computer using the Microsoft Internet Explorer browser. Internet Spy can automatically load at each system startup and optionally run in the stealth mode
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Stealth Storage 

Stealth Storage is a small and powerful file encryption tool. It encrypts files on-the-fly using well-known strong ciphers like BLOWFISH, RIJNDAEL etc.
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Comtun Pro 

stealth network firewall, NAT software router, HTTP caching, SOCKS server, access control and authentication, built-in DHCP Server, dial-up control, VPN (PPTP and IPSec), network monitoring and management, banner blocking, firewall timing control
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Spy4PC 

* Application usage recording * Keystroke recording * Screenshot recording * Email recording * Chat/Instant Messaging recording * Website Recording * Totally Stealth in windows
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Stealth Files 

Stealth Files hides any type of file in almost any other type of file. This is called steganography. This is a way of encrypting data so that it is hard to find. You can not decrypt something unless you know what to decrypt...
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