Top 20 NuGet system Packages

Generate Audit Logs from file system events using a FileSystemWatcher
Enrich Serilog event with environment variables.
Provides Managed Service Identity Management (Fluent) capabilities for Microsoft Azure.
This is a .NETStandard / .NET Core port of the the Microsoft assembly for the .Net 4.0 Dynamic language functionality.
An API documentation can be found at https://help.cryptolens.io/api/dotnet/. This is a client API that serves as an interface to Cryptolens Web API (app.cryptolens.io/docs/api/). NB: There is also one for C++ (https://github.com/Cryptolens/cryptolens-cpp)
.NET file system for portable FTP server
boost_system-vc140. Compiler: Visual Studio 2015 Update 3.
boost_system-vc141. Compiler: Visual Studio 2017 15.7.4.
An Entity Component System to make MonoGame more awesome.
A high performance particle system to make MonoGame more awesome.
boost_system-vc120. Compiler: Visual Studio 2013 Update 5.
Contains basic tools for Rjindael encryption, password hashing and type conversion as well as helpful extensions for basic typs like Images, String and Lists.
boost_system-vc110. Compiler: Visual Studio 2012 Update 4.
boost_system-vc100. Compiler: Visual Studio 2010 SP1.
Dynamic Linq extensions for EntityFramework which adds Async support
boost_system-vc90. Compiler: Visual Studio 2008 SP1.
provides Windows.Storage API to Xamarin.Forms
HealthChecks.System is the system health check package.
This C# library provides units management in different measure system (International System, CGS, Imperial system and US).
Vikings System Extensions