PortsMonitor is described as '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'. There are nine alternatives to PortsMonitor for Windows, Linux, Online / Web-based and PortableApps.com. The best alternative is PRTG Network Monitor, which is free. Other great apps like PortsMonitor are TCPView (Free), CurrPorts (Free), cStatus (Free) and NetStat Agent (Paid).
An advanced network monitoring solution to monitor network up/downtime, traffic and usage. Features include availability, performance, and bandwidth monitoring (SNMP, WMI, packet sniffing, NetFlow), instant alerts, reporting, failover clustering.
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.
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.
Proc Net Monitor is the FREE software to monitor & analyze the Network activity of all running Process on your system. It shows all open network Ports (TCP/UDP) and active Network Connections for each process.
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.