powershell-sandbox

Using a specific shell
https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions#using-a-specific-shell


https://github.com/PowerShell/PowerShell

PSScriptAnalyzer is a static code checker for PowerShell modules and scripts. 
https://github.com/PowerShell/PSScriptAnalyzer

Pester is the ubiquitous test and mock framework for PowerShell. 
https://github.com/pester/Pester

PSDeploy
The idea is that you write a *.psdeploy.ps1 deployment configuration with sources and targets, and PSDeploy will deploy these.
https://github.com/RamblingCookieMonster/PSDeploy

PowerShell Gallery
The central repository for sharing and acquiring PowerShell code including PowerShell modules, scripts, and DSC resources
https://www.powershellgallery.com/