Open-source alternatives to Modal Bottom Sheet

PanModal is an iOS UI library used to create draggable bottom sheet modals that slide up from the bottom of the screen. It provides a programmatic interface for managing the layout, height, and state of these overlay panels, allowing content to be presented over a main view without navigating away from the current screen. The library includes a pan gesture coordinator that synchronizes touch movements between the draggable container and internal scrollable content. This ensures that sliding the modal and scrolling within its content do not conflict. The framework covers custom presentation l

This is a bottom sheet component library for React Native that provides gesture-driven panels sliding up from the bottom of the screen. The library is built around configurable snap points, dynamic sizing, keyboard awareness, modal presentation, and synchronized scrolling, with native driver animation offloaded to the native thread for smooth performance. The library distinguishes itself through deep gesture and animation control, including custom gesture handler overrides, scroll-gesture synchronization, and dynamic snap point recalculation when content size or keyboard visibility changes. I

flutter-go is a cross-platform UI framework and kit designed for building mobile and desktop applications using a Go backend and a Flutter frontend. It provides a communication bridge that enables Go functions to be executed from Dart code via a C-ABI foreign function interface. The project includes a Flutter UI component library and a frontend design gallery. These resources provide pre-designed interface patterns, reusable widgets, and interaction demos to assist with rapid application prototyping and consistent interface design across different operating systems. The framework covers nati

This is a comprehensive library of code examples and reference implementations for building cross-platform user interfaces with Flutter. The project provides a collection of demo applications and guides designed to illustrate the implementation of design patterns, animation techniques, and testing workflows. The repository features specific demonstrations for native integration, including examples of embedding modules into existing native applications, using platform channels, and bridging native code with the framework. It also serves as an animation reference, providing implementations for

Awesome Flutter UI is a collection of design patterns and layout templates designed to accelerate the development of mobile application interfaces. It functions as a cross-platform UI kit, providing a library of pre-built components that allow developers to construct standard mobile screens and user flows using a unified codebase. The project distinguishes itself by offering ready-made templates for common mobile application requirements, including authentication, profile management, and media streaming. It also includes specialized patterns for mobile onboarding, enabling the creation of int

Tamagui is a cross-platform user interface framework designed to build high-performance, themeable applications that share logic and styling across web and mobile environments. It functions as a comprehensive design system orchestrator, providing a collection of type-safe components that compile to optimized atomic CSS for the web and native code for mobile platforms. By utilizing a build-time compiler, the framework eliminates runtime overhead, ensuring consistent visual output and interaction behavior regardless of the target platform. The framework distinguishes itself through its advanced

Vaul is a React drawer component used to create accessible, draggable bottom sheets and slide-up panels. It serves as a mobile-friendly alternative to traditional dialogs and modals by rendering content into a separate DOM node via a portal to avoid layout nesting issues. The library features configurable snap points that allow panels to lock into specific vertical heights during drag gestures. It supports hierarchical UI layering, enabling the use of nested drawers for complex navigation or multi-level menus. The component includes an accessibility layer with ARIA announcements and focus ma

This project is a cross-platform UI showcase and component gallery that provides interactive examples of interface widgets and design patterns. It serves as a practical reference for building consistent user interfaces across mobile, web, and desktop platforms. The gallery functions as a tool for evaluating the visual and functional capabilities of the framework. It allows for the review of pre-built components to determine if specific requirements are met and provides a resource for testing how various widgets and layouts behave during the prototyping process. The project covers cross-platf

This project is a cross-platform mobile UI framework and component library for building native interfaces. It provides a suite of pre-built interface controls and a scalable design system to ensure a uniform visual language across mobile screens. The library is centered on a theme-based system that uses a centralized configuration object to manage colors, spacing, and typography. This configuration propagates through the component tree, allowing developers to customize the global theme or apply local style overrides to individual elements. The framework includes a collection of reusable Mate

This project is a general purpose library for the .NET ecosystem, providing a collection of reusable helper methods and APIs for common programming tasks. It encompasses a UI component library for cross-platform development, a toolkit for MVVM architecture, and specialized utilities for memory management and native interoperability. The library distinguishes itself through high-performance memory abstractions, such as pooled buffers and contiguous two-dimensional memory spans, designed to reduce garbage collection pressure. It also provides native interop wrappers and bindings to facilitate d

Getwidget is a comprehensive Flutter UI component library and design system providing over 1,000 pre-built widgets for creating cross-platform user interfaces. It serves as a production-ready widget gallery designed to accelerate the front-end development process through a wide array of pre-composed elements. The project includes a specialized AI interaction UI kit featuring components for rendering streaming large language model responses, RAG chat interfaces, and real-time voice agents. It also provides operational utilities for estimating monthly LLM expenditures based on token usage and p

Varlet is a Vue 3 material design component library and cross-platform UI framework. It provides a collection of reusable interface elements based on Material Design 2 and 3 standards for building responsive web applications. The library features integrated support for internationalization and multi-language content localization. It includes a theming system that utilizes CSS variables to enable dark mode, color scheme toggling, and custom branding. The toolkit is designed for server-side rendering to improve initial page load speeds and search engine optimization. It includes responsive com

React Native Paper is a cross-platform UI framework that provides a comprehensive suite of pre-built components based on Material Design specifications. It serves as a library for building consistent mobile interfaces by mapping high-level design elements to native platform primitives, ensuring a unified visual language across different operating systems. The library distinguishes itself through a global context provider that manages theme injection and portal-based overlay rendering for elements like modals and tooltips. Developers can apply custom brand identities by overriding default desi

Varlet is a Vue3 material design component library used to build mobile and desktop user interfaces. It provides a collection of standardized components based on Material Design 2 and 3 specifications. The framework functions as a cross-platform UI suite that adapts between mobile touch interactions and desktop environments. It includes a themable component system with customizable design variables and dark mode settings to align interfaces with specific branding. The library supports server-side rendering to improve initial page load speeds and search engine visibility. Additional capabilit

ReactXP is a framework for building cross-platform mobile and web applications from a single codebase using React. It provides a declarative interface that maps to different native implementation sets depending on the target environment. The project enables consistent visual experiences across operating systems through a flexbox-based layout engine, a virtual stack for navigation management, and a unified native-bridge API for accessing system services. It distinguishes itself with specialized capabilities for declarative animation orchestration, platform-specific logic resolution, and an aut

React Native Modalize is a customizable bottom sheet component designed for mobile applications. It functions as a navigation and interface utility that allows users to access secondary content or settings through slide-up panels without leaving their current screen context. The library distinguishes itself by processing touch events and swipe gestures directly on the UI thread, ensuring responsive interaction across different mobile devices. It utilizes a portal-based rendering approach to position modal content above all other application elements, while its internal logic synchronizes scro

This project is a collection of reference implementations and sample applications for Flutter. It provides practical examples covering API integration, user authentication, data persistence, and a gallery of UI patterns. The repository distinguishes itself by offering a wide array of functional demos, including implementations for Google and email-based identity verification, cloud database synchronization, and the use of both relational and key-value local storage. It also includes specialized utility examples such as expense tracking, tip calculation, and body mass index tools. The project

gluestack-ui is a cross-platform React component library built with Tailwind CSS. It provides over 30 pre-built, accessible components that can be installed by copying their source files directly into a project, giving developers full control over customization without external runtime dependencies. Every component implements WAI-ARIA patterns, keyboard navigation, and screen reader support out of the box. A key differentiator is the copy-paste architecture: rather than a traditional package dependency, component source code is placed in the project, allowing direct editing and eliminating ve

XPopup is an Android popup UI framework and overlay component library used to build customizable dialogs, bottom sheets, and overlay views. It serves as a dialog engine for creating high-performance popup views and provides a toolkit for executing entrance and exit transitions. The library is distinguished by its ability to render ultra-long, high-resolution images using memory-efficient loading and drag-to-dismiss interactions. It supports displaying overlay views while an application is in the background through system overlay permissions. The framework covers anchor-based positioning for

AsyncDisplayKit is an asynchronous UI framework and performance library for iOS. It provides a collection of performant alternatives to standard views, allowing developers to build responsive interfaces by offloading layout and rendering tasks to background threads. The framework is centered around a declarative layout engine based on a flexbox model, which calculates element positions and sizes asynchronously. It utilizes a node-based abstraction to wrap native views, enabling the instantiation and configuration of UI hierarchies on background threads to prevent main thread blocking. The sy

Material Kit is an open-source UI component library that provides pre-styled Material Design elements for building responsive web interfaces with Bootstrap 5. It offers a collection of reusable components like buttons, inputs, navbars, cards, and modals that follow Google's Material Design guidelines, along with a 12-column flexbox grid system for fluid layouts that adapt to any screen size. The kit distinguishes itself by including pre-built page sections such as headers, feature blocks, pricing tables, and footers that can be combined into complete page layouts, reducing the time needed to

The mdb-ui-kit is a frontend component library and visual extension that combines the Bootstrap 5 framework with Material Design principles. It provides a collection of pre-styled interface elements and responsive web templates to facilitate the development of consistent web applications. The toolkit extends the Bootstrap ecosystem by adding Material Design aesthetics and advanced styling options. It enables rapid prototyping through the use of pre-configured design blocks and provides mechanisms for deep visual customization via SCSS variables and native CSS custom properties, including supp

A library to bring fully animated Material Design components to pre-Lolipop Android.

This project is a declarative UI pattern library and reference implementation for structuring layouts, navigation flows, and data collections across Apple platforms. It provides a collection of practical implementation patterns and component examples for building user interfaces using the SwiftUI framework. The library serves as a cross-platform reference for rendering visual content on iOS and macOS. It includes a view implementation guide that covers managing navigation, handling user inputs, and embedding web content. The codebase covers broad capability areas including layout management

body-scroll-lock is a DOM scroll locking library and cross-browser scroll controller. It provides utilities to disable page scrolling while maintaining scrollability for specific nested elements across different browsers and devices. The project functions as a layout shift prevention utility and a web UI modal scroll manager. It includes mechanisms to add padding to the body when scrollbars are removed to prevent horizontal flickering and content shifting. The library covers scroll management for mobile navigation and modal interactions, enabling specific containers to remain scrollable whil

This project is a cross-platform UI component for React Native applications that provides a customizable overlay window for presenting content on top of existing application views. It serves as a library for managing animated modal components, backdrops, and mobile transitions. The component distinguishes itself through support for custom enter and exit animations and highly configurable backdrops, allowing for the adjustment of opacity, color, and the integration of custom elements. It also implements gesture-based dismissal, enabling users to close overlays via background taps or swipes in

This project is a comprehensive UI toolkit that provides a declarative, reactive framework for building modular web interfaces. It centers on a component-based architecture that maps application state to rendered elements, utilizing a twelve-point flexbox grid system and nested containers to manage complex layouts. The library ensures consistent behavior across large-scale applications by providing centralized configuration for component defaults, themes, and global design tokens. What distinguishes this framework is its deep integration of Material Design principles alongside a highly flexib