Top 20 NuGet .net40 Packages

The general EnergyTrading .NET common library
EnergyTrading distributed cache support classes specifically for AppFabric
Provides in memrory cache feature
Common functionality for use with SimpleData over Oracle
AppSettings source for smartconf. Visit https://github.com/nemec/smartconf.sources for more information.
.Net library for TopoJSON and GeoJSON types and corresponding Json.Net (de)serializers.
Asynchronous Log4Net appenders and forwarder
Artem ASP.NET XML membership providers for .NET 4.0.
DillPickle is a simple BDD framework that understands the Gherkin feature syntax.
An easy to pick up library containing things you wish were in the BCL.
Adds Enterprise Library 5 Logging Block settings to your WCF project
Nuno Costa
Fluent sql query builder for WebMatrix.data with paging support.
Small and lightweight 3D vector and matrix library for .NET 4.0.
A shared library with web security tiny membership providers and base functionality for building ASP.NET custom membership providers. Currently it holds only XML membership providers - a migration of ASP.NET XMLProviders for .NET 4
Lightweight implementation of the ActiveRecord pattern, built on top of the 10gen Mongo C# driver.
IdentityMap plugin for Ormongo
Helper for running integration tests using Ormongo against a test MongoDB instance
A TreeView which supports, unlike the standard tree in WPF, multiple selection and is a little better stylable.