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.
SqlServer - Elasticsearch Sync
ASP.NET MVC and HtmlTags integration. HTML controls builder.
An client RPC library (abstract + Json RPC 2.0 implementation) for .Net.
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.
A transactional file manager for .NET. Inspired on ChinDo's implementation
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 library for dealing with streams in .Net.
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.
Contiene varios helpers que crean elementos HTML
A Ninject extension for Prism Update with strong name support
Logger facade
A set of utilities
Provides classes that abstract access to a cache item or collection of cache items
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).
Unit tests Data Access implementations for Entity framework