Open-source alternatives to Emscripten

EASTL is a C++ Standard Template Library implementation consisting of containers, iterators, and algorithms. It provides cross-platform data structures and a template-based algorithm library designed for use in resource-constrained game engine environments. The library focuses on game engine memory management, providing specialized utilities that ensure predictable memory allocation and high-performance access for real-time applications. These containers maintain consistent behavior across different operating systems and hardware platforms. The project covers high-performance C++ development

Yoga is an embeddable UI layout library and engine that implements the flexible box model used in web standards. It functions as a cross-platform tool for computing user interface geometry, calculating element sizes and positions without relying on a specific operating system's rendering. The engine provides a portable C++ core to ensure identical layout calculations across Android, iOS, and the web. It utilizes an abstract node interface to separate the layout logic from the host UI framework, allowing it to be integrated into native applications. The system manages interface rendering thro

This project is a header-only C++ library designed for graphics mathematics, providing a comprehensive suite of vector, matrix, and quaternion types. It is built using template metaprogramming to generate mathematical primitives at compile time, eliminating the need for precompiled binary libraries and allowing for direct integration into existing build systems. The library is distinguished by its strict adherence to the OpenGL Shading Language specification, ensuring that mathematical results remain consistent across both CPU and GPU code. It provides specialized utilities for managing float

spdlog is a high-performance C++ logging library designed to record diagnostic messages and application events. It serves as an asynchronous logging framework and thread-safe library that coordinates access across concurrent threads to maintain message integrity. The project functions as a multi-target log router, distributing single events to multiple destinations such as consoles, files, and system daemons. It includes a log rotation manager that handles file lifecycles through basic, rotating, or daily rollover strategies to prevent disk exhaustion. The library covers a broad range of cap

A family of header-only, very fast and memory-friendly hashmap and btree containers.

HarfBuzz is a text shaping engine that converts Unicode text into correctly positioned glyphs for any writing system. It processes OpenType layout features, substitution rules, and positioning tables to produce shaped glyph sequences from font data, and also handles Apple Advanced Typography font tables. The library provides a stable C API that abstracts over platform-specific font access and rendering backends, and includes a font table caching layer to avoid redundant parsing during repeated shaping operations. The project implements script-specific shaping logic for complex writing systems

Gainput

TinyXML-2 is a lightweight C++ library for parsing, manipulating, and generating XML documents. It functions as a UTF-8 XML processor that represents data through a hierarchical Document Object Model. The library provides tools for both DOM parsing and direct document generation via data streams. It includes capabilities for navigating the XML tree to locate specific elements, modifying attributes and content, and resolving character entities and Unicode numeric references into UTF-8 text. The processor includes syntax validation and diagnostic utilities that track line-number metadata for e

Contents - Example usage - In a nutshell - License - Dependencies - Installation - Synopsis - Features - Reported to work with - Building the tests - Other implementations of any - Notes and references - Appendix

yojimbo is a network library for client/server games written in C++.

Simple http-server for Single Page Apps (SPAs)

This is the development workspace for the ngx-offline-indicator Angular library.

GameNetworkingSockets is a UDP networking library providing secure transport, peer discovery, and traffic control systems. It implements a networking layer for reliable and unreliable messaging over UDP, including tools for message fragmentation and reassembly. The project features a peer-to-peer NAT traversal tool for establishing direct host-to-host connections by punching through firewalls and network address translation layers. It secures network traffic through encrypted transport and secure key exchange. The library includes a traffic manager to organize data into prioritized lanes to

Cross Platform Object Oriented Input Lib System. Meant to be very robust and compatible with many systems and operating systems.

This is a header-only C++ library that provides implementations for HTTP clients, HTTP servers, and a WebSocket framework. It allows for the creation of network services and the consumption of remote APIs without requiring a separate compilation step or external binary linking. The project features backend-agnostic TLS integration for secure HTTPS and WSS communication and employs a thread-pool model to process concurrent requests. It distinguishes itself with a full-duplex WebSocket state-machine and a middleware-based request pipeline that supports regular-expression path routing. The libr