Svendsen Tech's PSnmap is an asynchronous Linux nmap look-alike for PowerShell. Ping sweeps and scans a network (accepts CIDR notation) for specified open ports. Also performs DNS lookups.

A PowerShell based module that can decode System Errors, Exit codes, port numbers, HTTP Statuses and more. This module can be used to quick lookup Error descriptions, to add verbosity to your custom error messages and for a better Error Handling, Investigation and Analysis. System Errors : Windows System Errors and Exit Codes [Total = 2764] ... More info

Allows redirecting requests for web domains on default port 80 to a localhost:port. Ex. gosho.com -> localhost:1111, pe6o.com -> localhost:1112

This function will show the Instances and the Port Numbers on a SQL Server using WMI and the status of the relevant SQL Service and its start mode

Perform External Port Scanning

Checks if a port is currently active or in use. Usage: IsPortActive.ps1 -Port <port>