Top 20 NuGet Adjunct Packages

Annotation attributes for use with ReSharper, so you dont have to reference the ReSharper DLLs directly.
Ordered Set implemenetation.
Disposable with EventHandlerDictionary
MVC Annotation attributes for use with ReSharper, so you dont have to reference the ReSharper DLLs directly.
Self Balancing Binary Search Tree
Binary Tree Infrastructure
A PascalSet space optimized for having fewer elements over a large range of integers.
Simple multithreading lock
LogBase, Debug, and Trace loggers for CaliburnMicro
ValidatingScreen for CaliburnMicro
Simple 'IoC' container wrapper.
EventHandlerDictionary
ISetEx and base class implementation, builds on ISet
System.IO.FileInfo Extensions
System.IO.Stream extensions
Basic packaged resource reader.
System.Text.StringBuilder extensions.
Simple text templating engine
Linq to Xml Extensions for Enumerations
Linq to Xml Extensions for Guids