TN3270 Plus 

TN3270 Plus is a flexible, efficient and inexpensive telnet client application for connecting Windows PC users to IBM mainframe, AS/400, and UNIX systems via TCP/IP. TN3270 Plus delivers 3270, 5250, VT100, VT220 and ANSI terminal emulation.
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PortsLock 

PortsLock is a firewall with user-level access controls for Windows NT/2000/XP. Once PortsLock is installed, administrators can assign permissions to TCP/IP connections, just as they would in managing permissions on an NTFS partition of a hard disk.
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NetInfo 

NetInfo is a collection of 15 different state-of-the-art network tools on a single, easy-to-use interface.
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Imaginary Telnet Server 

When your computer is connected to the Internet and someone is trying to break in by Telnet, he will be served a fake response which will prevent him from accessing any resources available on your system.
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Acid Scanner 

Advanced scanning tool to audit your network. Includes many ip utilities in one program. Shared resource scan, ping, port scan, traceroute, terminal (tcp/udp) and much more... Incredibly fast due to its multithreading desing.
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SocketTools Secure Subscription 

The SocketTools Secure Subscription plan includes Windows dynamic link libraries (DLLs), ATL-based COM objects and ActiveX controls (OCXs) which can be used in a wide variety of programming languages such as Visual Basic and Visual Studio.NET.
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