Open Source Libraries
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Browse free open source Libraries and projects for Windows and Android 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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Auth0 B2B Essentials: SSO, MFA, and RBAC Built InAuth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.
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libjpeg-turbo
SIMD-accelerated libjpeg-compatible JPEG codec library
libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal. On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines. In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs. libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface. -
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libusb
A cross-platform library that gives apps easy access to USB devices
Library to enable user space application programs to communicate with USB devices -
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m3u
Live Source
The m3u project is a personal collection and integration of IPTV playlist sources, maintained as a hobby with casual updates. It aggregates streaming sources into .m3u files that can be subscribed to directly in various media players across platforms. The repository provides both simplified and full versions of playlist files, including dedicated lists for live streams and customizable options for users who want personalized M3U configurations. It emphasizes accessibility by offering multiple subscription addresses and supporting IPv6 sources. The project also suggests compatible software players for iOS, Android, Windows, and smart TVs, ensuring that users can easily set up and play live streams. While updates are “as time allows,” the repository has become a popular community-driven resource for IPTV enthusiasts who want quick access to organized streaming content. -
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raylib
A simple and easy-to-use library to enjoy videogames programming
raylib is highly inspired by Borland BGI graphics lib and by XNA framework. Do you want to see all functions available in raylib? Check raylib cheatsheet. raylib is a programming library to enjoy videogames programming; no fancy interface, no visual helpers, no auto-debugging, just coding in the most pure spartan-programmers way. raylib has received several recognitions in the last years and many people have written about the library. Here there are the main awards received from Google and Epic Games. raylib supports multiple target platforms, it has been tested in the following platforms but, technically, any platform that supports C language and OpenGL graphics is valid for raylib or can be very easily ported to. raylib can be combined with several extra libraries for additional functionality, some of those libraries are already used internally while others are provided for user integration, most of these libraries are single-file header-only with no external dependencies. -
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OpenH264
Open Source H.264 Codec
Cisco has taken their H.264 implementation and open-sourced it under BSD license terms. Development and maintenance will be overseen by a board from the industry and the open-source community. Furthermore, we have provided a binary form suitable for inclusion in applications across a number of different operating systems and made this binary module available for download from the Internet. We will not pass on our MPEG-LA licensing costs for this module, and based on the current licensing environment, this will effectively make H.264 free for use on supported platforms. OpenH264 is a codec library which supports H.264 encoding and decoding. It is suitable for use in real-time applications such as WebRTC. Constrained Baseline Profile up to Level 5.2 (Max frame size is 36864 macro-blocks). Arbitrary resolution, not constrained to multiples of 16x16. Rate control with adaptive quantization, or constant quantization. -
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libimobiledevice
A cross-platform protocol library to communicate with iOS devices
libimobiledevice is a cross-platform software library that talks the protocols to interact with iOS devices. Unlike other projects, it does not depend on using any existing proprietary libraries and does not require jailbreaking. Access filesystem of a device, access documents of file sharing apps, retrieve information about a device and modify various settings, backup and restore the device in a native way compatible with iTunes. Manage app icons arrangement on the device, install, remove, list and basically manage apps. Activate a device using official servers, manage contacts, calendars, notes and bookmarks, retrieve and remove crashreports. Retrieve various diagnostics information, establish a debug connection for app debugging, mount filesystem images, forward device notifications, manage device provisioning. Take screenshots from the device screen (requires mounted developer image). Simulate changed geolocation of the device (requires mounted developer image). -
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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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Extended Module Player
A multi-format module player and library
libxmp is a library that renders module files to PCM data. xmp is a module player for Unix-like systems, based on libxmp, that plays over 90 mainstream and obscure module formats from Amiga, Atari, Acorn, Apple IIgs and PC, including Protracker (MOD), Scream Tracker 3 (S3M), Fast Tracker II (XM) and Impulse Tracker (IT) files. -
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armorpaint
3D PBR Texture Painting Software
ArmorPaint is stand-alone software designed for physically-based texture painting. Drag & drop your 3D models and start painting. Receive instant visual feedback in the viewport as you paint. Work fast with the convenience of nodes. Paint with fully procedural materials. Build fill layers with material nodes. Use brush nodes to create patterns and procedural brushes. ArmorPaint is designed from scratch to run completely on the GPU. This results in a smooth 4K painting experience on medium-power integrated hardware. Up to 16K texture painting is seamless using a high-end graphics card. Ray-traced baking, painting effects and viewport rendering feature running on Direct3D12 and Vulkan are in progress. ArmorPaint is powered by an in-house 3D rendering engine to achieve the best painting experience. -
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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EMV NFC Paycard Enrollment
A Java library used to read and extract data from NFC EMV credit cards
Java library used to read and extract public data from NFC EMV credit cards. -
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ncnn
High-performance neural network inference framework for mobile
ncnn is a high-performance neural network inference computing framework designed specifically for mobile platforms. It brings artificial intelligence right at your fingertips with no third-party dependencies, and speeds faster than all other known open source frameworks for mobile phone cpu. ncnn allows developers to easily deploy deep learning algorithm models to the mobile platform and create intelligent APPs. It is cross-platform and supports most commonly used CNN networks, including Classical CNN (VGG AlexNet GoogleNet Inception), Face Detection (MTCNN RetinaFace), Segmentation (FCN PSPNet UNet YOLACT), and more. ncnn is currently being used in a number of Tencent applications, namely: QQ, Qzone, WeChat, and Pitu. -
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libaums
Open source library to access USB Mass Storage devices on Android
Open source library to access USB Mass Storage devices on Android without rooting your device. A library to access USB mass storage devices (pen drives, external HDDs, card readers) using the Android USB Host API. Currently, it supports the SCSI command set and the FAT32 file system. -
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FlatBuffers
Memory Efficient Serialization Library
FlatBuffers is an open source, cross-platform serialization library designed for maximum memory efficiency. Originally created at Google for game development and other performance-critical apps, FlatBuffers has the unique ability of allowing you to directly access serialized data without having to parse or unpack beforehand. Since the only memory needed to access your data is that of the buffer, it is also very memory efficient and fast. FlatBuffers supports Windows, MacOS, Linux and Android, as well as any other operating systems with a recent C++ compiler. It supports a great number of programming languages, including C++, C#, C, Go, Java, Kotlin, JavaScript, Lobster, Lua, TypeScript, PHP and many others in progress. -
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Leaflet
Open-source JavaScript library for mobile-friendly interactive maps
Leaflet is a leading open source JavaScript library for creating interactive, mobile-friendly maps. Leaflet is light at just about 38 KB, but is already fully equipped with all the mapping features you could need. Leaflet is simple but efficient. It doesn’t try to do everything for everybody, rather it focuses on making the basic things work perfectly. It comes ready with exceptional layering tools, customization features such as pure CSS3 popups and controls, map controls and more right out of the box, and works on all major desktop and mobile platforms. Leaflet also comes with a range of interaction features, and can be extended with an abundance of great plugins. -
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Calibre-Web Automated
Calibre-Web but Automated and with tons of New Features
Calibre-Web-Automated (CWA) is an all-in-one, self-hosted solution for managing an ebook library that combines the modern, lightweight web UI style of Calibre-Web with the deeper tooling and conversion capabilities associated with Calibre. The goal is to reduce the common “two-service” setup where users run Calibre-Web for browsing and Calibre separately for conversions, metadata fixes, and automation, by packaging those workflows together in a single system. CWA keeps the familiar strengths of Calibre-Web, like a responsive interface, OPDS feeds for e-readers, and strong user/permission management, while layering in extensive automation features that handle ingest, conversion, metadata enforcement, and library organization with less manual effort. It also expands authentication options (including modern OAuth/OIDC flows) and adds quality-of-life improvements such as enhanced search/filtering, multi-language UI support, and better device-centric workflows for sending to e-readers. -
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OpenBLAS
Optimized BLAS library based on GotoBLAS2 1.13 BSD version
OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. The BLAS (Basic Linear Algebra Subprograms) are routines that provide standard building blocks for performing basic vector and matrix operations. The Level 1 BLAS performs scalar, vector and vector-vector operations, the Level 2 BLAS performs matrix-vector operations, and the Level 3 BLAS performs matrix-matrix operations. Because the BLAS are efficient, portable, and widely available, they are commonly used in the development of high-quality linear algebra software, LAPACK for example. The reference BLAS is included inside the LAPACK package. Please refer to tools built under Windows using Cmake the cross-platform, open-source build system. The new build system was developed in collaboration with Kitware Inc. Machine-specific optimized BLAS libraries are available for a variety of computer architectures. These optimized BLAS libraries are provided by the computer vendor or by an independent software vendor. -
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Kotlin Wrappers
Kotlin wrappers for popular JavaScript libraries
This repository hosts a number of Kotlin wrappers for popular JavaScript libraries. To learn more please refer to the READMEs of individual modules. Artifacts are published to Maven Central, see the corresponding README files for package coordinates. All packages require JDK 8 to be installed. -
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LibChecker
An app to view libraries used in apps in your device
This app is used to view the third-party libraries used by applications in your device. It can view the ABI architecture of the application's native library (in general, whether the application is 64-bit or 32-bit). It can also view well-known libraries marked by The Rule Repository, and can even sort and view them according to the number of libraries references. -
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ESP32 BLE Keyboard library
Bluetooth LE Keyboard library for the ESP32
This library allows you to make the ESP32 act as a Bluetooth Keyboard and control what it does. Compatible with Android. Compatible with Windows. Compatible with Linux. Compatible with MacOS X (not stable, some people have issues, doesn't work with old devices). Compatible with iOS (not stable, some people have issues, doesn't work with old devices). There is also Bluetooth-specific information that you can set (optional): Instead of BleKeyboard bleKeyboard; you can do BleKeyboard bleKeyboard("Bluetooth Device Name", "Bluetooth Device Manufacturer", 100);. (Max length is 15 characters, anything beyond that will be truncated.) By default the battery level will be set to 100%, the device name will be ESP32 Bluetooth Keyboard and the manufacturer will be Espressif. This feature is meant to compensate for some applications and devices that can't handle fast input and will skip letters if too many keys are sent in a small time frame. -
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Vico
A light and extensible chart library for Android
Vico is a light and extensible chart library for Android. It’s compatible with both Jetpack Compose and the view system, but its two main modules—compose and views—are independent. -
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spdlog
Fast C++ logging library
spdlog is a header only library. Just copy the files under include to your build tree and use a C++11 compiler. It provides a python like formatting API using the bundled fmt lib. spdlog takes the "include what you need" approach, your code should include the features that actually needed. For example, if you only need rotating logger, you need to include "spdlog/sinks/rotating_file_sink.h". spdlog provides various log targets, which are, rotating log files, daily log files, console logging (colors supported), syslog, Windows event log, and Windows debugger (OutputDebugString(..)). Easily extendable with custom log targets. Log filtering, log levels can be modified in runtime as well as in compile time. Support for loading log levels from argv or from environment var. Backtrace support, store debug messages in a ring buffer and display later on demand. -
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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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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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Keybase client
Keybase Go library, client, service, OS X, iOS, Android, Electron
Keybase is secure messaging and file-sharing. We use public key cryptography to ensure your messages stay private. Even we can’t read your chats. Keybase works for families, roommates, clubs, and groups of friends, too. Keybase connects to public identities, too. You can connect with communities from Twitter, Reddit, and elsewhere. Don’t live dangerously when it comes to documents. Keybase can store your group’s photos, videos, and documents with end-to-end encryption. You can set a timer on your most sensitive messages. This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software. -
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CPU Features
A cross platform C99 library to get cpu features at runtime
cpu_features is a cross-platform C library developed by Google that provides a simple and efficient way to detect available CPU features at runtime across a wide range of architectures and operating systems. It enables applications to determine which instruction sets (such as SSE, AVX, or NEON) are supported on the host machine, allowing developers to optimize performance dynamically. The library supports numerous architectures—including x86, ARM, AArch64, MIPS, POWER, RISCV, LoongArch, and s390x—and works on major operating systems like Linux, macOS, Windows, FreeBSD, Android, and iOS. Implemented in portable C99, it is thread-safe, has no memory allocations, and raises no exceptions, making it suitable even for use in low-level system libraries. The design emphasizes portability, extensibility, and compatibility with sandboxed or restricted environments where direct CPU access may be limited.
