NuGet is microsoft’s attempt at a package manager.
It works well for adding open source code to a visual studio project.
You can even host your own local server.
The basic nuget command-line download goes back to the home server to get the latest NuGet.exe which can then be used to obtain other components – even outside of visual studio.
To get the list of items (with a minimal description) you can use:
nuget list -verbose
Some of the projects are a little vague (or personal demos). Most look very interesting.