Monitor open TCP and UDP ports on your PC. With the help of this utility you may view the list of open ports, process IDs that open these ports, local and remote IP addresses and connection state. This software maps open ports to the applications that own them, helping you easily detect trojans, spyware or malware. You may even instantly close an open unwanted connection or export the list of open ports into a text file for future research.

Serial Port Mapper allows you to map any serial ports to any other serial ports. For example you install additional serial port expansion card to computer as COM7 serial port but your favorite software can work with COM1...COM4 ports only. To resolve this problem you can use Serial Port Mapper to map new COM7 port either to COM1 or to COM2...COM4. Now your software can open COM1 port (or COM2...COM4) but actually work with new COM7 port.

CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, version information, the user that created it, and more.
In addition, CurrPorts allows you to close unwanted TCP connections, kill the process that opened the ports, and save the TCP/UDP ports list to HTML file, and more.

Serial Port ActiveX Control is a powerful component that lets developers quickly and effectively work with serial port. Use Serial Port component to easily communicate with external devices on RS232 connection, such as modems, bar code readers, PBX and so on. Serial Port introduces several extremely useful properties for detailed setting of serial port, numerous methods to write and read from port and events to control serial port state changes.

Advanced Port Scanner is a small, very fast, easy-to-use and robust port scanner for the Win32 platform. It is multithreaded, so on fast machines you can scan ports in very a few seconds. It has descriptions for the common ports and can perform scan on predefined port ranges.

Creates virtual COM ports directly from your own programs and fully control them! Virtual ports look like real hardware serial ports for all serial communications applications. On the other hand, developer API allows your program to access data written to virtual serial port by communications application and to respond with your own data. OEM license allows you to distribute this ActiveX control as a part of your software.

Create and manage virtual serial ports from .NET and Visual Basic (ActiveX)
Using Virtual Serial Port SDK you can create a "new" serial port on your computer. This serial port is completely controlled by your application. Other 3rd party applications can connect to this serial port and believe it is a normal serial port.
Windows Mobile/Pocket PC, Windows XP/2k/NT and Windows ME/98.
Samples in C#, VB.NET and VB6

Share Serial Ports is an advanced utility for sharing real serial ports between multiple applications so that all applications will receive same data from real serial port simultaneously. It is achieved by creating virtual serial ports, exact copies of real ones. All virtual ports can send data to real serial port. You will be able to set port permissions to read, write or change control lines state for every application separately.

Configurable UDP and TCP port forwarding.
Define IP address ranges to allow or block for each port being forwarded.
Have program forward multiple ports simultaneously.
View the current data throughput speed of each port forwarding operation.
Have program log connection events to a text file.
Run program without installing (if desired).
Bounce connections back to connector (on same or different port).
100% freeware.

Advanced Port Scanner is a small, very fast, robust and easy-to-use Port Scanner for Windows. Powered with multithread scan technology, Advanced Port Scanner can scan hundreds of ports in just a few seconds! Also, it contains descriptions for common ports, and can perform scans on predefined port ranges.

Virtual Serial Port ActiveX Control is a powerful tool for professional developers that allows your application to create custom additional virtual serial port in system and fully control it. Created virtual serial port looks like real serial port for other Windows applications. From your application you can control data sent to virtual serial port by other applications and respond to them by sending own data to virtual serial port.

Did you ever wonder what program opened that strange port that suddenly appeard in netstat ? Then Advanced Netstat is what you need ! Many trojans,backdoors,viruses and worms open ports on your system to allow an attacker to access your system and remotely control it. Advanced Netstat helps you to spot such applications. It shows you exactly which applications listen on the network for connections. It is the perfect tool for Administrators but al

The perfect complement to firewalls and anti-virus software.Complete control over all running processes,show all open ports and maps them to running processes,show all DLLs loaded or Windows opened by each process,terminate or block any process,manage start-up applications and Browser Helper Objects(BHO),tweak and optimize Windows,schedule your computer to shut down at a specified time.Protect your system from viruses,trojans and spyware.

EzDNS publishes and/or emails your PC's dynamic IP address (both local and outside address) and connection information to a remote web page or text file that is customizable. EzDNS is deal for people with cable or DSL internet.

See which ports belong to which programs! Port Explorer shows all the open ports on your system and what programs own them. Along with this ability it also has many tools including a packet sniffer, bandwidth throttling and country detection to name just a few. Port Explorer has an intuitive GUI that allows you to quickly see all your network activity, and thanks to its ease of use is allowing people everywhere to do advanced network activities.