Top 20 NuGet system Packages

boost_system-vc140. Compiler: Visual Studio 2015 Update 3.
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.
This package contains file-system extension for the CG.IO namespace. Platforms supported: .NET 4.61 or above .NET Standard 2.0 or above
Generate Audit Logs from file system events using a FileSystemWatcher
Dynamic Linq extensions for EntityFramework which adds Async support
MailSystem is a suite of .NET components that provide users with an extensive set of email tools. MailSystem provides full support for SMTP, POP3, IMAP4, NNTP, MIME, S/MIME, OpenPGP, DNS, vCard, vCalendar, Anti-Spam (Bayesian , RBL, DomainKeys), Queueing, Mail Merge and WhoIs
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)
Compression (Deflate / GZip) module for Microsoft OWIN self host web server. With this module you can compress, deflate / gzip large files (like concatenated *.js or *.css files) to reduce amount of web traffic.
Dynamic Linq extensions for Microsoft.EntityFrameworkCore which adds Async support
BeatPulse.System is the system health check package for BeatPulse
Json.NET web client
Castle Windsor system web facility lets you easily add windsor to legacy aspnet web apps.
Bumblebee is a .NET layer on top of the Selenium browser automation framework allowing for standardized creation of page objects, even for dynamic web pages.
.NET file system for portable FTP server
boost_system-vc141. Compiler: Visual Studio 2017 15.7.4.
File System API abstraction
Aurochses Runtime is a library based on System.Runtime.
PCL Extension provides file system implementations for PCL, .NET Framework, .NET Core, Xamarin.iOS, Xamarin.Android and Xamarin.Mac. This makes it easier to create cross-platform .NET libraries and apps. Supports .NET Standard now. UWP support is temporarily removed.