Top 20 NuGet .net4 Packages

Really Simple Service Discovery Protocol - a 100% .Net implementation of the SSDP protocol for publishing custom/basic devices, and discovering all device types on a network.
ASP.NET MVC and HtmlTags integration. HTML controls builder.
SqlServer - Elasticsearch Sync
Build.Mvc is a HtmlHelper extension library that turns the standard ASP .NET MVC 4.0 HtmlHelper methods into jQuery-style chainable methods that allow you to expressively add markup and style to your MVC application.
Build.Mvc is a HtmlHelper extension library that turns the standard ASP .NET MVC 5.0 HtmlHelper methods into jQuery-style chainable methods that allow you to expressively add markup and style to your MVC application.
Implementation for log4net
Entity Framework utilities
A transactional file manager for .NET. Inspired on ChinDo's implementation
MVC utilities
Build.Mvc is a helper extensions method library that turns the standard ASP .NET MVC 3.0 HtmlHelper methods into jQuery-style chainable methods that allow you to expressively add markup and style to your MVC application.
An client RPC library (abstract + Json RPC 2.0 implementation) for .Net.
A Ninject extension for Prism Update with strong name support
Logger facade
A set of utilities
Utilities for Autofixture
You probably want Spooky.Json20, not this package. Spooky is a client RPC library for .Net, providing an abstraction layer for RPC calls (using sytems such as Json RPC).
ASP.NET utilities
Unit tests Data Access implementations for Entity framework
Utilities for Autofixture and AutoMapper
Utilities for Autofixture and Entity Framework