Top 20 NuGet Socket Packages

Chilkat .NET Class Library (64-bit) for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
Transport model in DotNetty
General purpose codecs for DotNetty
Application handlers for DotNetty
Buffer management in DotNetty
DotNetty common routines
MQTT codec for DotNetty
It's a .NET socket tool which can simplify the socket client developing. This difference between this package and SuperSocket.ClientEngine is it doesn't include the protocol resolving library.
Chilkat .NET Core Class Library
ExchangeSharp is a C# API for working with various cryptocurrency exchanges. Web sockets are also supported for some exchanges.
A cross platform SocketCluster library for .NET NetStandard Core.
Chilkat .NET Class Library (32-bit) for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
Zyan is a framework that simplifies development of distributed applications for desktop and mobile platforms. With Zyan you can publish any .NET class for remote access over the network. Zyan is highly customizable and provides you with tools to build modular and plugable distributed applications.
UDP Socket implementation for NZSmartie.CoAPNet
A C Sharp user control set used to design the ui for your application
Chilkat Runtime Component for Universal Apps for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, HTTP, RSA, Encryption, XML DSig, WebSocket, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
A C Sharp user control set used to design the ui for your application
Arrowgene.Services aids in creating a server with multiple clients.
High performance, reactive TCP / UDP socket middleware for .NET
Protobuf Proto3 codec for DotNetty