delight software gmbh
Speed Limiter can simulate slow TCP/IP connections with new amazing features.
List available hosts, open ports, and their characteristics.
SmartSniff is a general-purpose network sniffer for Windows operating systems.
Xenomorph dot Net
Tweaks your Windows XP/Server 2003/Vista/Server 2008, for free.
displays useful information about your network adapters.
Power TCP FTP Free transfers files between your desktop and any FTP/FTPS Server.
Bandwidth Meter 2001 is a compact freeware program to monitor your TCP/IP network connections to pro....
Freeware security configuration utility for Windows.
Can close TCP/UDP ports 135, 137-139, 445 and....
BuzzSIP is a VOIP softphone that allows you to speak with any other softphone.
Tansu TCP, Free TCP Trace Tool which forwards tcp packets to another server.
TAL Technologies, Inc.
TCP-File allows you to easily log TCP/IP data from any number of TCP/IP ports.
Mizu Softphone is a professional VoIP softphone for Windows users.
sipLite softphone is a free softphone which works with SIP protocol.
The VpcashCalls Softphone is a basic softphone which runs on Microsoft Windows.
Flachmann & Heggelbacher
Establishes TCP connections, accepts a TCP connection on a local port, etc.
Speed Guide Inc.
SG TCP Optimizer allows you to tune and optimize TCP and IP related parameters.