Cross Platform GitHub Repositories (2026) · Open Source Tools

Eclipse SWT - The Standard Widget Toolkit

Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5

This library is designed to help you use the Material, Fluent or Cupertino design system with the Uno Platform

Podcasts in any terminal. Fast, clean, offline.

Swift 3D Game Engine for Windows, macOS, iOS, Linux

Open a Proxmox VE SPICE or VNC console from the command line

Standardized protocol for in-app purchases across all platforms — backed by Meta & Amazon

Glaze: a CGo-free desktop WebView toolkit for Go

Local-first desktop activity tracker — see where your hours go, with on-device AI daily summaries and optional multi-device sync

Approval Tests implementation in NodeJS

A feature-complete reader and client for LANraragi

Cross-platform chapter editing and conversion toolkit for desktop, CLI, WebAssembly, and Node.js, with support for Blu-ray and common media chapter formats.

Ownaudio is a cross-platform C# audio library that works across platforms without external dependencies.

🍨 A XMake integration in IntelliJ IDEA

CNA is a cross-platform multi-language XNA 4.0 API ecosystem powered by a high-performance C++ core, featuring 18 renders and 10,000+ pixel-perfect integration tests

SkiaSharp is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library. It provides a comprehensive 2D API that can be used across mobile, server and desktop models to render images.

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

XMPP network library

Self-developed dual-mode Bluetooth stack in standard C++. Cross-platform for Windows, Android, Linux and RTOS. Modular design with thread-pool scheduler. Inter-module message delivery, serial execution to reduce locks. Features HCI, L2CAP, QoS, extended flow spec, packet validation and state machines. Support feature trimming for embedded & PC.C.

Office-style Ribbon control for Uno Platform: adaptive layouts, contextual tabs, backstage, Quick Access Toolbar, KeyTips, galleries, theming and full MVVM support.