Top 20 NuGet extensions Packages

Ext.NET extensions.
Add some extensions. this package will absolutely be updated in future
Package Description
Etcd as a configuration source.
Simple and usefully extensions for C#
LINQ Extensions
Json module
MVC extensions
Log4Net extension
Class library for accelerating UWP application development.
A .NET Standard 2.0 library of extension methods for primitive types such as string, DateTime, boolean, el al. Most of these extensions just serve as helper methods that either make code easier to read or make it more efficient to do common tasks.
UsefulExtensions it's an open source .NET Standard library that contains useful extensions to help developers coding fast and clean.
A dapper extension library. Support MySQL,SQL Server,PostgreSQL,SQLite,Oracle and ODBC, Support cache.
New collections and extension methods for existing interfaces like IEnumerable<T> and ICollection<T>
Useful library of integer extensions and methods.
.Net Helper Extension for strings
Package Description