Fport

Port Explorer is an advanced (yet easy-to-use) lightweight state-of-the-art socket analysis and exploration utility, designed for both novice and advanced users alike. Although still a relatively new program, Port Explorer is quickly becoming accepted as the leading program of its class... Platforms: Windows

DiamondCS OpenPorts is a freeware CLI (command line interface/console) tool that allows you to see all open TCP and UDP ports on your system, including the owner process. Using advanced port-to-process mapping technology, OpenPorts is powerful, accurate, reliable, and results can be displayed in... Platforms: Windows

Port Explorer shows you all the open ports on your system and what programs own them (called Port to Process mapping). 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... Platforms: Windows