Open Source Dart Libraries for BSD

A predictable state management library that helps implement the BLoC design pattern. The goal of this library is to make it easy to separate presentation from business logic, facilitating testability and reusability.

flutter_hooks extends Flutter with a hooks system inspired by React Hooks, aiming to simplify stateful logic inside widgets. It allows developers to reuse and isolate stateful behaviors like animations, controllers, and subscriptions without writing boilerplate StatefulWidgets. Common hooks like useState, useEffect, and useMemoized provide clear ways to manage lifecycle and dependencies inside a widget’s build method. The library improves code readability by keeping logic close to the UI definitions and avoiding repetitive patterns. By encapsulating behavior in hooks, developers can create reusable building blocks across multiple widgets. It integrates seamlessly with existing Flutter tools and promotes cleaner, functional-style widget code.

Nylo is a powerful framework for developing mobile apps in Flutter. Out of the box, it comes with a router, secure storage, networking, and more.

Dart Sass is the canonical, fully‑featured official implementation of the Sass stylesheet preprocessor, superseding Ruby Sass. Written in Dart, it emphasizes speed, portability and ease of maintenance. Available as standalone CLI, Dart library, and npm JS distribution, it supports semantic versioning, CSS compatibility, and an embedded API for host integration.

Fluro is a lightweight, flexible routing library for Flutter that brings expressive, URL-like navigation to mobile apps. It lets developers define route patterns with path parameters and optional query strings, making it simple to extract dynamic values from navigation paths. The library focuses on clear, centralized route configuration, reducing boilerplate compared to hand-rolled navigation code. It supports custom route transitions so screens can animate in ways that match an app’s brand and motion language. Error handling hooks help capture unknown routes, and developers can funnel users to fallback pages or gracefully redirect. Because it sits close to Flutter’s own navigation mechanisms, it integrates cleanly and remains easy to adopt incrementally. Fluro’s sweet spot is teams that want readable, testable route tables and predictable parameter passing without heavy architectural overhead.

flutter_easy_refresh is a refresh widget library for Flutter that supports pull-to-refresh and load-more gestures with highly customizable behavior. It provides multiple built-in refresh headers and footers, including classic, material, ball-beat, and custom animated styles. Developers can easily implement infinite scrolling, lazy loading, and paginated content with fine-grained control over triggers and states. The library emphasizes smooth, adaptive animations and compatibility with slivers, lists, and grids. Because it is extensible, users can design their own refresh indicators to match branding or app style. Its focus is on delivering a responsive, modern UX for content-heavy apps such as feeds, shopping apps, and news readers.

flutter_rust_bridge is a toolchain that generates ergonomic bindings between Rust and Dart/Flutter so you can write performance-critical logic in Rust while building UI in Flutter. It abstracts away the low-level FFI details, letting developers define Rust functions and data structures that are safely callable from Dart. The project supports passing complex types, handling async operations and streams, and integrating with Flutter across mobile and desktop targets. By leaning on Rust’s memory safety and zero-cost abstractions, it enables compute-heavy tasks—parsing, crypto, image/audio processing, and more—without sacrificing Flutter’s developer experience. Build scripts and templates streamline packaging and distribution so the Rust side fits cleanly into CI and multi-platform releases. In practice, teams gain a maintainable way to share one performant Rust core across multiple Flutter apps while keeping the UI reactive and fast.

GetWidget is an open‑source Flutter UI toolkit offering over 1000 ready‑to‑use widgets for mobile and web apps. Maintained by IonicFirebaseApp, it's designed to accelerate UI development, reduce boilerplate, and improve app aesthetics. The library is MIT‑licensed, community‑driven, and features components ranging from buttons and alerts to carousels and loaders.

rust_core is a pure Dart implementation of patterns found in Rust's core library, bringing the power of Rust to Dart.