Before a few weeks, I was playing with hosting a private NuGet server and creation of own packages. For this purpose I have created a few packages from my small solution called Marazt.Commons and published them on Nuget.org.
This package contains base class for WPF development like base class for view-model with various extension method for binding, property notifying, etc.
Contains implementation of some desing patters, e.g. Strategy.
Contains aspect classes based on PostSharp aspects, e.g. advance default value aspect.
I want to publish it GitHub in the future too.