TCPView!

Process Hacker is a feature-packed tool for manipulating processes and services on your computer. A free and open source process viewer with powerful process termination and memory searching/editing capabilities.

CurrPorts is network monitoring software that 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, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.

See connections in real-time: When an app makes a network connection, you see it instantly on your screen. There's no delay and you don't have to use a separate recording mode.

PortsMonitor is a system utility for monitoring system TCP/IP network connections by application, and connections' status. With Search Expression support, you can filter connection with preferred conditions.

Proc Net Monitor is the FREE software to monitor & analyze the Network activity of all running Process on your system.

NetStat Agent is a powerful and easy-to-use network toolkit for monitoring and diagnosing. It includes all useful network tools like netstat, ping, traceroute, ipconfig, dns query (nslookup), whois, arp, route and http checker. It provides you with the ability to retrieve all available information about your network configuration.

TCPEye is an easy-to-use monitoring application that will display a list of all network processes. It sports all the features of "netstat" command and adds some options of its own as well as some third party online tools for IP tracing.

Netactview is a graphical network connections viewer for Linux, similar in functionality with Netstat. It includes features like process information, host name retrieval, automatic refresh and sorting.