Top 20 NuGet heitech Packages

Encapsulates behavior between two or more Objects with Messages that are interceptable at the Receiver side.
Mediator pattern with so called Outlets as sinks
Customizable Pipeline (think WCF Messageinterception, ASP Net MVC Middleware)
Common Linq Extensions, Slicing support in C# and String extension methods. Includes also common linq operations as Array returning operations.
Extend objects with attributes at runtime.