A selection of flutter tutorials and source codes
Source Code: Flutter beaches app
Tutorial: Choreographing animations across screens
Source Code: TODOAppUI Only the color transitions
Source Code: Todo app iPhone X Card expansion example
Make a progress button in Flutter
Video Tutorial: Flutter progress button animation
Source Code: FlutterProgressButton
Tutorial: A Deep Dive Into FloatingActionButton in Flutter
Video Tutorial: Create Custom Widgets for Android and iOS
Video Tutorial: Flutter login page UI
Source Code: Flutter login page UI
Everything you need to know about Flutter page route transition