Top 20 NuGet client Packages

Infura.io API
Easiest way to handle rest requests
Unofficial Telegram (http://telegram.org) client library implemented in C#. Support .NET Standard 2.0. Latest TL scheme supported.
A small .NET Standard library for making REST requests.
A simple client for Atlassian JIRA service REST API with AGILE API access.
A .NET Rosbridge client. The Rosbridge protocol independent implementation.
Data Access Component that makes it easy to setup and query data from SQL server.
DotNet implementation of NetFlix Feign (https://github.com/OpenFeign/feign). Integrates with Microsoft DependencyInjection to generate the wrapper code from an interface representing a Rest end point.
Network library of honjo-net framework. Provides a powerful, robust and extensive support for client/server based network applications.
A modern, feature-rich and highly tunable C# client library for YugaByte DB
Api Client for Proxmox VE.
FakeHttpMessageHandler seamlessly fakes http request sent from System.Net.Http.HttpClient for purpose of unit testing code that previously could only be integration tested.
POP3 client library
IMAP4rev1 client library
Provides a full and clean solution to POST, GET,PUT or DELETE data to server using a Rest API.
Project infrastructure for mobile applications