Impeller provides a new rendering runtime for Flutter. Impeller precompiles a smaller, simpler set of shaders at engine-build time so they don't compile at runtime.
Understanding Impeller — Flutter’s Modern Rendering Engine | by Ammar Yasser | Medium
Avalonia UI – Open-Source .NET XAML Framework | WPF & MAUI Alternative
.NET Rocks! Avalonia 12 with Mike James & Matt Lacey
Avalonia, the open source UI framework for building cross-platform applications with .NET. Mike's conversation with the Google Flutter team has led to replacing the Skia rendering engine in Avalonia with the newer Impeller Rendering Engine that Flutter itself depends on. This opens the door to excellent smartphone implementations with Avalonia, alongside its usual desktop and embedded roles.