Top 20 NuGet common Packages

Dapplo.Windows.Common is a library which contains common files for Dapplo.Windows projects
Lykke common tools and utilities
ServiceStack Templates, Virtual File System, SimpleContainer and Common library for ServiceStack projects.
JSON, XML, JSV, SOAP and MQ Generic Service Clients.
Provides infrastructure for common error handling, tracing, configuration, and HTTP/REST-based pipeline manipulation for REST clients generated with Hyak.
.NET Standard 2.0 version of ServiceStack.Common
.NET Standard 2.0 version of ServiceStack.Client
The Enterprise Library Common assembly contains elements that are shared among multiple application blocks. By supplying a set of commonly used functions to all the application blocks, the Common assembly reduces the dependency of one application block on another.
common .netstandard libarary and extensions
Easily bridge the old with the new and shiny: Common Logging adapter for Serilog structured logging.
A set of useful methods used across Easy.* projects.
Laobian.Common is shared library for private usage only
Deprecated. Use the strong named ServiceStack.Client package instead.
PostSharp.Patterns.Diagnostics: support for Common.Logging.
MultiTenancyServer core library.
JSON ServiceClient implementation based on .NET's HttpClient
Base classes and helpers for building your own modules for Intent Architect.
Kode-Aid shared common library.
Dijing.Common is a common library for .NET
ComponentPro Common Lib for .NET comprise utility classes used by Ultimate FTP, SFTP, Mail, Terminal, SFTP Server, Email Validator, Bounce Inspector, and Netkit.