Public feed for official Sitecore PowerShell packages
Official Sitecore PowerShell modules gallery
Sitecore supports the powershell nuget package management system for distributing new Sitecore powershell modules as packages.
Sitecore powershell modules as nuget packages are provided "as is". Support is provided on a best effort basis, without any SLA, and designed mostly for feedback.
Link to Sitecore Nuget License agreement.