Top 20 NuGet .net40 Packages

A library containing an extension method GetPropertyName which allows retrieving the property name from a lambda expression.
A library containing methods to decode GUIDs.
A library containing OpenSSL-like extension methods for HashAlgorithm.
A helper library for P/Invoke Interop.
OAuth 1.0 client library.
A light-weight data-access framework based off of Rob Conery's Massive. Framework supports bare-metal access to SQL returning "dynamic" objects representing the results.
Simple implementation of basic authentication using only one dll and one xml file with credentials.
A testable fake SMTP server
Extensions to WCF Data Services that make it easier to expose arbitrary data sources.
Testing library for all Granite projects. Includes support for testing events.
T4 Factories uses T4toolbox to automatically generate the source code for factory implementations and even contracts (if they don't exist already), based on a concrete class and a base interface. It allows easier use of the factory pattern for easier unit testing and refactoring.
Inspector.Xna module for Gemini, adding editors for XNA types to the Inspector module.
Ripplo api client library for .NET. Using this library you can easily consume Ripplo.com WCF REST service hosted at http://api.ripplo.com/.
Metro module for Gemini, integrating MahApps Metro window
EnergyTrading extensions for Unity container
Enterprises Library implementations of EnergyTrading interfaces
This is client .Net library to easy startup with Quicklogons service
SharpDX module for Gemini, providing integration for SharpDX/Direct3D content in WPF.
MonoGame module for Gemini, providing WPF integration for MonoGame content.
Inspector.MonoGame module for Gemini, adding editors for MonoGame types to the Inspector module.