There are 1 repository under ssom topic.
SharePoint artifact provision for .NET platform. Supports SharePoint Online, SharePoint 2019, 2016 and 2013 via CSOM/SSOM.
Untech.SharePoint - library that will improve your work with Lists in SharePoint (can be used with SSOM and CSOM)
The repository for common MetaPack packages. https://github.com/SubPointSolutions/MetaPack
The only ReSharper plugin which understands SharePoint API. Helps to identity and solve common SharePoint API pitfalls.