Top 20 NuGet payments Packages

Unofficial .NET client for ClearBank integration, creating online payments via their API. Bank payment handling automation in United Kingdom.
PayNL Gateway SDK
The official Smart2Pay library, supporting .NET Standard 1.3+, .NET Core 1.1+, and .NET Framework 4.6.1+
Unipag SDK for .NET Framework
Add Dwolla In App payments to your Windows 8 Metro applications
Add Dwolla In App payments to your Windows Phone 8 applications
Official client library for Balanced Payments.
Lipisha Payments .NET SDK
SDK that implements APIs of Juspay's payments as a service platform, Express Checkout. Easily integrate with any payment gateway.
Qiwi Wallet API Library, supports transactions history, money transfers, etc
A basic WinForms UI implementation for integration with the Yort.Eftpos.Verifone.PosLink package.
A simple .NET SDK to ease the merchant integration with Paynow Zimbabwe's payment gateway
Unofficial Yandex Money Android SDK (com.yandex.money.api:yandex-money-sdk-android) Xamarin bindings
Multi-framework PayPal SDK for .NET developers targeting different frameworks and run-times e.g .NET Framework, .NET Core, and .NETStandard
Worldpay Access Checkout SDK binding for Xamarin Android.
MangopayNetCoreSDK is a Microsoft .NET Core client library to work with Mangopay REST API.
Add Dwolla In App payments to your Windows 8 Store applications
API Client library that helps you get up and running and consuming Paynovas restful API. Offers a simple client that handles the HTTP communication with Paynova. It also offers typed requests and responses to assist you in discovering the Paynova API, validating digests etc.