I've extracted relevant information from the text about PortScan & Stuff and other related topics. Here's a summary:

PortScan & Stuff:

* A free software to detect equipment connected to a network channel

* Scans all available ports, checks each channel separately, and provides additional information like MAC address, host name, HTTP, SMB, FTP, SMTP, MySQL, etc.

* Can scan ports on fast machines in a few seconds and perform scans on predefined port ranges

* Free versions available for iPhone, iPad, and Android; an upgrade to 'Pro' is also available

Free Port Scanner:

* A small, fast, easy-to-use, and robust port scanner

* Uses TCP packets to determine available hosts and open ports, services associated with the port, and other vital characteristics

* Can scan ports quickly on fast machines

Other Related Tools:

* Angry IP Scanner: a free IP address discovery system that scans devices and counts open ports

* Nmap: a well-respected command line tool to discover IP addresses and perform port scans on specific targets; available for Windows, Linux, macOS, and Unix

Let me know if you'd like me to help with anything else!

Free PortScan & Stuff 1.95 for iphone download