Top 20 NuGet networking Packages

A series of utilities to ease networking, with the usage of asynccronous requests responses and coroutines. The documentation can be found on http://www.kendar.org/?p=/dotnet/networkhelpers. Same performance of Owin but...simpler!
Foundation for building TCP servers easily.
Simple library to ease the pain of doing networking.
An embedded HTTP/REST server framework for .NET and mono, with a focus on simplicity and a secondary focus on performance.
Dream-Remoting is a networking solution primarily geared towards game development
Base library for other networking-related components of ITCC Library. Contains common enums and interfaces.
F# bindings and type providers for the Control Plane Services API.
GladNet3's (Glader's Library for Advanced Development of Network Emulation Technologies) serializer API library. Install this package if you need to implement adapters for the serializer to be used in the GladNet3 networking.
GladNet3's (Glader's Library for Advanced Development of Network Emulation Technologies) handler API. Install this if you want to create message handlers that can handle GladNet3 messages.
Frack is an F# based socket implementation for high-speed, high-throughput applications. It is built on top of SocketAsyncEventArgs, which minimises the memory fragmentation common in the IAsyncResult pattern.
A simple and easy to use networking library for .net core
A networking library for C#, focusing on performance and built on top of SocketAsyncEventArgs.
A high Performance C# file downloader that asyncrounously downloads files as pieces. Made as a faster, more efficent replacement to Microsoft's WebClient.