Top 20 NuGet payments Packages

A fully featured C# library for making and receiving payments using the Bitcoin network.
This SDK is for an old version of Dwolla's API and is no longer actively maintained.
The AfricasTalking API Wrapper for .NET
Mondido Payments SDK for .net
CodeMash tools for .NET developers. Access codemash.io tools from .NET
RevStack Implementation of the QuickBooks Payments API
This is a .net library that allows interaction with https://api.conekta.io API.
Unofficial Yandex Money Java SDK (com.yandex.money.api:yandex-money-sdk-java) Xamarin bindings
The Entity Framework implementation of the DevAccelerateFinancials library.
Worldpay Access Checkout SDK binding for Xamarin iOS.
Extension methods for Swedbank Pay SDK
C# .NET Integration with Peanut Labs social monetization ( http://www.peanutlabs.com ) Samples in ASP.NET MVC and ASP.NET Webforms included
A very minimal .NET library for the PayPal NVP API, supporting .NET 2.0+ and ASP.NET Core.
Unofficial community backed Mobius API client for .NET Core 2.0. Stongly typed and async, provides ease of access to the Mobius API for .NET developers.
Payabbhi .NET Library
API Wrapper for Cardknox Payment Processor written in C# with support for payments, recurring transactions, and reporting. Refer to https://kb.cardknox.com for full API reference or https://github.com/TheScripters/Cardknox-API-Wrapper/wiki/ for library reference
AtomicPay.NET C# SDK enables you to easily interact with your AtomicPay.io account in your .NET project.
Unofficial client implementation for communicating with the Tikkie API.
This SDK provides client support for the USAePAY REST API.