Top 20 NuGet notifications Packages

Send notifications from application
Firebase cloud messaging for Xamarin.Forms (iOS + Android)
This package is the core of a generic noificaitons system. You can use existing simple implementations or extend functionality as needed.
Expo Server SDK Client for dotnet Push notifications
Dot NET Blazor Notifications popup
.Net Core package to send push notifications. This also includes sending iOS MDM push.
Accurate toast notifications for WPF, visually similar to Windows 10 notifications.
Notifications for email, telegram, etc...