B&W Port Scanner is a program that will scan your TCP ports.
List available hosts, open ports, and their characteristics.
SMTP Server Software
QK SMTP Server is a mail server base on Simple Mail Transfer Protocol.
Identify or detect the devices connected to your network.
Named Pipe TCP Proxy - utility which provides access to named pipes on Windows.
HW Virtual Serial Port allows creating virual serial port drivers.
The dialer uses one local UDP port and one local TCP port.
NetworkActiv AUTAPF is a UDP and TCP port forwarder.
A multi-threaded and fast TCP port scanner.
A powerful connect-based TCP port scanner, pinger and hostname resolver. Multithreaded and asynchron....
Send an ICMP packet (ping) to a device, connect to a required TCP port.
This tool is handy if you encountered unexpected TCP port conflict exceptions.
Displays remote network computer IP, ICMP, TCP, UDP and Server statistics.
An HTTP, reverse, mail, and generic TCP/UDP proxy server.
ServerTalk lets you communicate directly with a TCP or UDP port on a server.
Scriptable data terminal supporting serial port, UDP, TCP client/server, etc.