Top 20 NuGet Packages

RestfulRouting is a routing library for ASP.NET MVC based on the Rails 3 routing DSL.
Restify is an opionated foundation framework to create C# REST API wrappers. It is intended to be used by anyone who wants to create a wrapper for a REST API implementation in C#. (Current only supports OAUTH). Building upon Restify will give you ease in consuming REST APIs.
A simple, basic .NET REST library
Restpack.io C# client for HTML to PDF API, and Screenshot API
A C# WebApi library for building REST queries server side using Dynamic Linq
Result monad for C#. In its core this monad enhances a type by adding a success/failure status. For more information see http://csharp-functional.readthedocs.io/en/latest/result-monad.html.
Result type for C# and F#
RethinkDB Client Driver for .NET
This package provides cryptography utilities.
This package provides a framework for building Html and Xml markup.
This package provides semantic extensions for OmniLog.
RFramework AOP filter.
The Rhino DSL project is a set of components that turned out to be useful across many DSL implementations. It contains classes to aid in building a DSL engine, implicit base classes, multifile DSLs, and so on.
RIAServicesContrib.EntityFramework provides the DbDomainService<T> class which can be used to create Domain Service classes for use with a DbContext from the EntityFramework package. This package supports versions of EntityFramework starting with EF 6.0.1.
RIBA payment systems
A simple Riemann driver for C#
A .net wrapper for Trion World's MMO 'Rift' REST API.
Rijndael256 makes encrypting data and files a breeze with the AES symmetric-key cipher Rijndael. Features: AES-128, AES-192, AES-256, Authenticated Encryption (AE), Encrypt-then-MAC (EtM), SHA-512, PBKDF2.
A simple .NET Core library for handling Alexa Smart Home Requests.
A Rocket.Chat realtime, managed .Net driver.