Fluttery

A Flutter package that helps with prototyping.

Framing

Helps with framing user interfaces. For example:

RandomColorBlock is a Container that paints itself with a random color. This way a developer can quickly frame out a user interface with regard to positioning and sizing without worrying about the final Widgets.

Layout

Various layout Widgets and tools that are not available in the Flutter framework.

For example:

CenterAbout positions a child Widget such that the child is centered at the given Offset. It needs to be used in a Stack.

OverlayBuilder displays a built Widget in the app's Overlay.

AnchoredOverlay is similar to OverlayBuilder except that it also provides an anchor Offset that is calculated to be at the center of the AnchoredOverlay. This allows you to easily stick Widgets on top of other Widgets. For example: popovers.

Gestures

Radial Drag Gesture Detector

Detect dragging motion with polar coordinates using RadialDragGestureDetector in fluttery:gestures. It's a gesture detector that reports like a dial about the center of the child Widget.

Animations

AnimationPlayer

Fine-tune your multi-phase animations with an AnimationPlayer. An AnimationPlayer provides controls to play Phases forward and backward at a speed of your choice. This helps a developer carefully craft the correct effect in the animation.

Libraries

animations
Animation tools that are not provided by the Flutter SDK
framing
gestures
Gesture tools that are not provided by the Flutter SDK
layout

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]