Open Source Libraries
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Browse free open source Libraries and projects for Windows and Apple iPhone below. Use the toggles on the left to filter open source Libraries by OS, license, language, programming language, and project status.
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Kivy
Innovative user interfaces made easy
Kivy is an open source, cross-platform UI framework that lets you develop applications that make use of innovative, multi-touch user interfaces. Written in Python with a graphics engine built over OpenGL ES 2, Kivy supports various input devices and protocols, and gives you access to over 20 widgets that are all highly extensible and have built-in multi-touch support. You can run the same codebase on Mac, Windows, Linux, Android and iOS. Kivy is 100% free and open source with a professionally developed and used toolkit, as well as a stable framework and well-documented API, so you can be confident in using it in a commercial product. -
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hosts
Consolidate and extend hosts files from several well-curated sources
Consolidating and extending hosts files from several well-curated sources. You can optionally pick extensions to block pornography, social media, and other categories. The unified hosts file is optionally extensible. Extensions are used to include domains by category. Currently, we offer the following categories: fakenews, social, gambling, and porn. Extensions are optional, and can be combined in various ways with the base hosts file. The combined products are stored in the alternates folder. Data for extensions are stored in the extensions folder. You manage extensions by curating this folder tree, where you will find the data for fakenews, social, gambling, and porn extension data that we maintain and provide for you. Create an optional blacklist file. The contents of this file (containing a listing of additional domains in hosts file format) are appended to the unified hosts file during the update process. A sample blacklist is included, and may be modified as you need. -
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FastClick
Easy-to-use library to remove click delays on browsers with touch UIs
FastClick is a simple, easy-to-use library for eliminating the 300ms delay between a physical tap and the firing of a click event on mobile browsers. The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic. FastClick is developed by FT Labs, part of the Financial Times. Note: As of late 2015 most mobile browsers - notably Chrome and Safari - no longer have a 300ms touch delay, so fastclick offers no benefit on newer browsers, and risks introducing bugs into your application. Consider carefully whether you really need to use it. The library has been deployed as part of the FT Web App. FastClick doesn't attach any listeners on desktop browsers. -
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Day.js
Fast, immutable 2kB alternative to Moment.js with the same modern API
Day.js is a fast, immutable, minimalist JavaScript library for parsing, validating, manipulating, and displaying dates and times for modern browsers. Its API is largely compatible with that of Moment.js, so if you know how to use Moment.js you’ll know how to use Day.js. Why opt for Day.js? Because it’s at just 2kB it involves less JavaScript to download, parse and execute, and more time for your code. Day.js is also immutable, chainable and has great support for internationalization. It currently supports all browsers. -
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stb
stb single-file public domain libraries for C/C++
stb is an open source collection of single-file C libraries created by Sean Barrett (nothings) for graphics, image loading, and utility functions. The repository provides lightweight, public domain libraries that can be easily integrated into projects without external dependencies or complex build processes. Popular components include stb_image.h for image loading, stb_image_write.h for writing images, and stb_truetype.h for font rendering. These libraries are widely used in game development, graphics engines, and multimedia applications due to their simplicity and portability. The project emphasizes ease of use, minimalism, and performance while avoiding bloated frameworks. Maintained and supported by the open source community, stb has become a standard toolkit for C and C++ developers working with images and graphics. -
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AppDevKit
AppDevKit is an iOS development library
AppDevKit is an iOS development library that provides developers with useful features to fulfill their everyday iOS app development needs. AppDevKit is an iOS development library that provides developers with useful features to fulfill their everyday iOS app development needs. Yahoo’s Taiwan based iOS app development team has been using this development kit for the past three years, and we plan future apps to use AppDevKit as well. Our use of this code in many apps helped improve its stability and utility. We find these libraries help address some incompatibility issues found in different iOS versions, and overall make app development easier and our apps operate more consistently. AppDevKit has five major parts that include command, user interfaces, animations, image view, and list view support libraries. AppDevKit could be installed by CocoaPods. Please feel welcome to use AppDevKit in your iOS projects as it is licensed under the permissive open source BSD license. -
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purePDF
A complete actionscript PDF library
purePDF is a complete PDF library for ActionScript designed as a port of the Java iText 1 library. It allows developers to both create and read PDF documents directly from running SWF files, enabling seamless integration of PDF functionality into Flash-based applications. The library supports a wide range of PDF features, including advanced text rendering, graphics, gradients, transparency, annotations, and interactive forms. It also provides robust support for images, fonts, metadata, barcodes, and even RTL text such as Arabic. With a modular structure and compatibility with common ActionScript libraries, purePDF delivers flexibility for building rich, document-driven applications. Its comprehensive set of tools makes it suitable for both simple and advanced PDF tasks, from generating tables to handling page transitions and multimedia features. The library is open source, with examples demonstrating its capabilities and a reference PDF showcasing all classes in use. -
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xtd
Modern C++20 framework to create console, GUI and unit tests.
xtd (pronounced "extend") is a modern C++20 framework to create console CLI), forms (GUI like WinForms) and unit test (xUnit) applications on Windows, macOS, Linux, iOS , Android, FreeBSD and Haiku. • Website : https://gammasoft71.github.io/xtd/ • Sources : https://github.com/gammasoft71/xtd • Reference guide : https://gammasoft71.github.io/xtd/reference_guides/latest/index.html • Install : https://gammasoft71.github.io/xtd/docs/downloads • Portability : https://gammasoft71.github.io/xtd/docs/documentation/portability • Examples : https://github.com/gammasoft71/xtd/tree/master/examples/README.md -
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BulletinBoard
General-purpose contextual cards for iOS
BulletinBoard is an iOS library that generates and manages contextual cards displayed at the bottom of the screen. It is especially well suited for quick user interactions such as onboarding screens or configuration. It has an interface similar to the cards displayed by iOS for AirPods, Apple TV/HomePod configuration and NFC tag scanning. It supports both the iPhone, iPhone X and the iPad. It has built-in support for accessibility features such as VoiceOver and Switch Control. -
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CCM (C# Collections Mapper)
The CCM is a mini ORM, working with the database and C# collections
CCM is a solution for the data management layer in the combination of Sql Server with a C # application. In whole this is a strongly typed entity mapper projecting the application's business logics onto database tables using T-SQL stored procedures. CCM allows you to implement fairly complex data structures in your application, without bothering about difficult and tedious questions of data acquisition and conversion issue, allowing you to pay more attention to the develop of business logic and UI. There no need to worry about migrations, context, etc. At the same time, ORM completely relieves the developer from direct communicating with ADO - datasets, tables, rows, and other data aceess component, to track connections, commands or operate with adapters because ORM works at a higher level of data abstraction. At the same time you will be completely protected from memory leaks and free to create complexity application logic at the primary data level. -
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FL Chart
FL Chart is a highly customizable Flutter chart library
fl_chart is a charting library for Flutter that focuses on expressive, highly customizable data visualizations with smooth animations. It offers a broad set of chart types—line, bar, pie, scatter, and radar—each exposed through clear data/option models rather than imperative drawing. Interactive features like touch handling, tooltips, selection/highlighting, and panning help apps present insights rather than static images. The package pays special attention to aesthetics, with options for gradients, curved lines, stacked bars, rounded corners, custom tick formats, and flexible legends. Because it’s built on Flutter’s rendering primitives, it scales crisply on any device and adapts well to layout constraints. Its API is designed so teams can start simple and progressively layer in formatting, interactions, and performance tweaks as dashboards grow in complexity. -
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GxApp
Open Utilities and/or Examples for GeneXus
Open utilities and/or examples for GeneXus, this includes: Example procedures Usercontrols Utilities Others... -
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JKCategories
Collection of useful Objective-C Categories extending iOS Frameworks
JKCategories(iOS-Categories), a collection of useful Objective-C Categories extending iOS Frameworks such as Foundation, UIKit, CoreData, QuartzCore, CoreLocation, MapKit Etc. -
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MaLiang
iOS painting and drawing library based on Metal
MaLiang is a painting framework based on Metal. It supports drawing and handwriting with customized textures. The name of "MaLiang" comes from a boy who had a magical brush in a Chinese ancient fairy story. A Canvas is the basic component of MaLiang. You will paint all things on it. Canvas extends from MetalView, which extends from MTKView. MetalView handles all the logic with MetalKit and hides them from you. MaLiang supports the automatic adjustment of stroke size with painting force. 3D Touch is supported by default, and simulated force will be setup on devices that do not support this. forceSensitive is the property that force affects the stroke size. It should be set between 0 to 1. the smaller the value is, the less sensitive will be. if sets to 0, then force will not affect the stroke size. -
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Mars
A cross-platform network component developed by WeChat
Mars is an open source, cross-platform infrastructure component and official terminal basic component of WeChat. It consists of four main parts: Comm, which contains a basic library, including basic tools like sockets, threads, alarm, message queues, and coroutines; Xlog, which provides high-performance, high-availability, security, and fault-tolerant log functions; SDT which is the network diagnosis module; and STN or signaling transmission network module, the major component of Mars responsible for the small data signaling channel between the terminal and the server. Mars has been proven effective by billions of WeChat users. It supports Android, iOS/macOS and Windows platforms, and is very mobile platform friendly due to its minimal power and traffic consumption. -
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Popovers
A library to present popovers. Simple, modern, and highly customizable
A library to present popovers. Present any view above your app's main content. Attach to source views or use picture-in-picture positioning. Display multiple popovers at the same time with smooth transitions. Supports SwiftUI, UIKit, and multitasking windows on iPadOS. Highly customizable API that's super simple — just add .popover. Drop-in replacement for iOS 14's Menu that works on iOS 13. SwiftUI-based core for a lightweight structure. 0 dependencies. It's 2023 — about time that popovers got interesting! -
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REEL SEARCH
A UI controller that allows you to choose options from a list
Reel Search is a Swift UI controller that allows you to choose options from a list. We specialize in the designing and coding of custom UI for Mobile Apps and Websites. Once the designers have created a gorgeous UI, you will need a team that will be able to turn this design into a working mobile application or website which will look and work exactly the way you have approved it at the design stage. Ramotion has been creating interfaces for many years and now we are ready to turn them into working mobile, web, and VR apps. Recently, our mobile application developers have released a series of Swift controls, which quickly gained popularity among mobile developers on Github and allowed Ramotion to become the # 1 contributor to Swift projects on the platform. -
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React Native Vector Icons
Customizable Icons for React Native with full styling
Perfect for buttons, logos and nav/tab bars. Easy to extend, style and integrate into your project. If you want to use any of the bundled icons, you need to add the icon fonts to your Xcode project. For each platform (iOS/Android/Windows) you plan to use, follow one of the options for the corresponding platform. Upgrading this package often requires the font files linked to your projects to be updated as well. If the automatic linking works for you, running this again should update the fonts. You can either use one of the bundled icons supported or roll your own custom font. Since Icon builds on top of the Text component, most style properties will work as expected, you might find it useful to play around with background color, border width, border color, border radius, padding, margin, color, font size, etc. -
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ReactXP
Library for cross-platform app development
ReactXP builds on the popular React JS and React Native frameworks. Share most of your code between the web, iOS, Android, and Windows. Create great-looking, responsive web pages and mobile apps that feel native. With React and React Native, your web app can share most its logic with your iOS and Android apps, but the view layer needs to be implemented separately for each platform. We have taken this a step further and developed a thin cross-platform layer we call ReactXP. If you write your app to this abstraction, you can share your view definitions, styles and animations across multiple target platforms. Of course, you can still provide platform-specific UI variants, but this can be done selectively where desired. ReactXP is designed with cross-platform development in mind. In general, it exposes APIs, components, props, styles and animation parameters that are implemented in a consistent way across React JS (HTML) and React Native for iOS and Android. -
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Riverpod
A reactive caching and data-binding framework
Riverpod is a modern, framework-agnostic state management and dependency injection library for Dart and Flutter that emphasizes compile-time safety and explicit data flow. Instead of tying state to widget trees, it models state as providers that can be read anywhere, making logic more testable and decoupled from UI. It supports synchronous state, async data (futures/streams) with built-in loading/error handling, and advanced patterns like derived state and provider scopes. Riverpod’s design reduces rebuilds by letting widgets depend on fine-grained slices of state, which leads to predictable performance in complex apps. The ecosystem includes code generation and utilities that help catch invalid provider usage at compile time rather than at runtime. Overall, it encourages a clear separation of concerns and scales cleanly from small prototypes to large, multi-module applications. -
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Time
Type-safe time calculations in Swift
Type-safe time calculations in Swift. Time is not just a bunch of Double conversion functions. The main advantage of it is that all time units are strongly-typed. Starting with Xcode 11, Time is officially available only via Swift Package Manager. Of course, you always have an option of just copying-and-pasting the code - Time is just two files, so feel free. -
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TweenKit
Animation library for iOS in Swift
TweenKit is a powerful animation library that allows you to animate (or 'tween') anything. TweenKit's animations are also scrubbable, perfect for building awesome onboarding experiences! By adding conformance to the Tweenable protocol, anything can be animated. You decide what it means to 'tween' your object, making this a flexible approach. -
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Zepto.js
JavaScript library for modern browsers with a jQuery compatible API
Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API. If you use jQuery, you already know how to use Zepto. While 100% jQuery coverage is not a design goal, the APIs provided match their jQuery counterparts. The goal is to have a ~5-10k modular library that downloads and executes fast, with a familiar and versatile API, so you can concentrate on getting stuff done. Zepto is open source software and is released under the developer and business-friendly MIT license. Note that some optional features of Zepto specifically target mobile browsers; as the original project goal was to specifically provide a leaner alternative to jQuery for the mobile web. Zepto is a good choice for browser extensions (for Safari, Chrome and Firefox) and to develop HTML-based views within native app frameworks, such as PhoneGap. In short, Zepto is expected to work in every modern browser and browser-like environment. -
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compose-icons
Popular Open Source icon packs for Compose Multiplatform
Compose Multiplatform icons is a pack of libraries that provide well-known Icon Packs. The library usage is inspired by Compose Material Icons. -
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delegates
Modern c ++ 17 library containing delegate.
Modern c ++ 17 library containing delegate which is a data structure that refers to a static method or to a class instance and an instance method of that class. * Github repository : https://github.com/gammasoft71/delegates * Homepage : https://gammasoft71.wixsite.com/delegates * Reference guide : https://codedocs.xyz/gammasoft71/delegates/ * Examples : https://github.com/gammasoft71/delegates/tree/master/examples
