Open-source alternatives to Model Viewer

DirectXTK is a C++ library designed to simplify 2D and 3D graphics, audio, and input programming for DirectX applications. It serves as a comprehensive toolkit providing high-level wrappers for DirectX graphics, audio management, and input handling. The toolkit includes a graphics wrapper for loading textures and rendering 3D models and 2D sprites, alongside a dedicated audio manager for sound effects and 3D spatial audio. It also provides an input handler to track and process state updates from keyboards, mice, and gamepads. The library covers a broad capability surface including 3D math an

This project is an educational platform and technical reference for learning real-time graphics programming through the development of custom shaders. It provides a comprehensive guide to the programmable graphics pipeline, offering a collection of tutorials and interactive examples that demonstrate how to manipulate coordinate spaces, manage buffer data, and implement complex rendering techniques in 3D environments. The repository distinguishes itself as a versatile toolkit for both photorealistic and non-photorealistic rendering. It includes modular implementations for stylized aesthetics s

Viser is a Python 3D visualization framework and remote scene server that renders 3D primitives, point clouds, and meshes in a web browser. It functions as a server-client system that synchronizes scene state and camera poses to a web client via WebSockets. The framework provides specialized capabilities for robotics and computer vision, including a URDF robot visualizer for loading robot models and joint states, as well as a GPU-accelerated Gaussian splatting viewer for high-fidelity volumetric rendering. It also supports the visualization of human body models and skinned meshes for pose ana

This project is a WebGL 3D game engine and comprehensive suite of tools for rendering high-performance 3D graphics and interactive scenes in the browser using WebGL and WebGPU. It provides a dedicated WebXR framework for building augmented and virtual reality experiences that run directly in a web browser. The engine includes a specialized Gaussian splatting renderer for displaying 3D point-cloud data to create photorealistic environmental captures. It utilizes a glTF asset pipeline to load and stream compressed 3D models and textures for efficient asset delivery. The system covers real-time

This is a web-based 3D game engine designed for creating high-performance interactive experiences on web and mobile platforms. It functions as a real-time graphics renderer and physics engine, utilizing a component-based scene graph to organize entities and their properties for three-dimensional rendering. The engine includes a visual scene editor that allows for the design of environments through a graphical interface, which then exports these assets as executable code. Its broader capabilities cover real-time graphics rendering for 2D and 3D elements, physical world simulation for object c

Babylon.js is a JavaScript game engine and real-time graphics renderer designed for creating interactive three-dimensional visuals and applications. It functions as a web-based 3D framework and WebGL engine that enables the deployment of high-performance 3D content across various web platforms and devices. The project provides tools for web-based 3D game development, real-time graphics rendering, and the creation of browser-based interactive visualizations. It also supports the development of WebXR virtual and augmented reality experiences using standard web technologies. The framework cover

AR.js is a web-based augmented reality framework used to create immersive experiences directly in a browser using WebGL and WebRTC. It provides a cross-platform runtime that executes on mobile devices and head-mounted displays without requiring a dedicated application installation. The framework includes a marker-based engine for detecting physical patterns or barcodes to anchor digital overlays, a location-based tool for positioning entities via GPS coordinates, and a face tracking library for anchoring content to human facial features. It supports multi-marker simultaneous tracking, custom

A-Frame is a declarative 3D scene engine and WebXR framework used to build virtual and augmented reality experiences directly in the web browser. It utilizes an entity component system where generic objects are assigned behaviors through attachable components and lifecycle hooks. The framework allows the assembly of immersive environments using HTML-like markup to define geometries, lighting, and materials. It implements WebXR standards to ensure consistent playback across different hardware and browsers, including support for VR headsets, desktops, and mobile devices. The system covers a br

This project is a web-based 3D experience and interactive gallery designed as a personal portfolio. It uses a virtual room simulation to create a spatial representation of a physical environment where users can navigate and explore digital art and creative work. The environment is rendered directly in the browser as an interactive 3D gallery, allowing users to engage with a spatial showcase through first-person navigation. The project utilizes WebGL-based GPU rendering and custom shader-based lighting to display complex spatial environments. It incorporates asynchronous asset loading and an

f3d is a fast 3D model viewer and rendering engine designed for visualizing 3D meshes, CAD files, and point clouds. It operates across multiple deployment profiles, functioning as a lightweight desktop application, a scientific data visualizer for volumetric and scalar datasets, a headless rendering engine for automated image generation, and a WebAssembly-based renderer for web applications. The project distinguishes itself through specialized support for Gaussian Splatting scene reconstructions and the ability to visualize complex scientific formats such as VTK, NetCDF, and HDF. It features

Konva is an object-oriented HTML5 canvas framework designed for building interactive 2D graphical applications. It provides a hierarchical scene graph that organizes shapes, images, and text into manageable nodes, groups, and layers. By mapping application state to canvas elements, the library enables developers to create complex visual interfaces using declarative patterns that synchronize with modern component-based frameworks. The library distinguishes itself through a robust event system that supports hit detection, bubbling, and direct manipulation of graphical objects, such as dragging,

Panda3D is a cross-platform game engine and 3D graphics rendering system developed for Python and C++. It functions as a comprehensive framework for building interactive 3D applications, providing a real-time physics simulator and a specialized 3D asset pipeline tool. The engine distinguishes itself by combining a high-performance C++ core with interoperable Python language bindings. It utilizes a scene graph architecture to organize 3D objects and provides a pipeline-based asset conversion system to optimize models and textures for runtime loading. Its capability surface includes low-level

PixiJS is a hardware-accelerated 2D rendering engine and HTML5 canvas library. It functions as a web-based graphics engine that utilizes WebGL to draw interactive digital content, shapes, text, and images in the browser. The engine provides a specialized pipeline for high-performance 2D graphics, featuring a scene-graph hierarchy for organizing visual objects and a system for dynamic texture management. It includes capabilities for applying visual effects through masks, filters, and blend modes. The project covers broad functional areas including digital asset loading, user input processing

This repository is a comprehensive collection of functional 2D and 3D demo projects and implementation samples for the Godot Game Engine. It serves as an interactive tutorial and reference library, providing a working codebase to demonstrate how to apply engine features in real-world scenarios. The collection focuses on practical implementation guides, covering a wide array of technical capabilities from basic engine fundamentals to advanced rendering and scripting techniques. It allows users to study the application of node-based composition, asset pipelines, and game logic through direct ex

gstack is an AI agent framework and development workflow system designed to automate the software development lifecycle. It coordinates specialized AI personas to manage tasks across product design, engineering management, and quality assurance, transforming product intent into technical specifications and final releases. The project is distinguished by its deep integration of headless browser automation and semantic code memory. It utilizes a persistent Chromium daemon for web scraping and visual auditing, and implements a searchable knowledge base that logs architectural decisions and repos

This project is an open-source 3D game engine designed for building high-fidelity games, simulations, and cinematic environments. It functions as a robotics simulation platform with native integration for ROS 2 to model robot controllers and sensors. The engine features a multi-threaded Forward+ physically based renderer that supports hardware-accelerated ray tracing and global illumination. The system is built on a modular extension architecture using Gems to add or replace features without modifying core binaries. It includes a native SDK for AWS cloud integration, enabling IAM authenticati

Orillusion is a WebGPU 3D rendering engine designed for high-fidelity scenes and visual effects in the browser. It functions as a GPU compute framework for parallel mathematical operations and a physically-based rendering graphics pipeline for realistic materials and surfaces. The system also includes a web-based 3D animation toolkit for driving skeletal animations and interpolating vertex positions. The engine is distinguished by its use of an entity component system for scene logic and a macro-based shader generation system that creates multiple shader variants. It optimizes performance thr

FFmpeg is a cross-platform multimedia framework designed for the recording, conversion, and streaming of audio and video content. It functions as a comprehensive toolkit that provides both a command-line utility for direct media manipulation and a collection of low-level libraries for integration into custom applications. At its core, the project utilizes a packet-based stream engine and a format-agnostic abstraction layer to handle diverse media standards, containers, and network protocols. The framework distinguishes itself through a modular, graph-based filter execution model that allows f

Rerun is a multimodal data visualizer and robotics data logger designed for rendering synchronized streams of 3D spatial data, images, and time-series metrics. It functions as a tool for capturing high-frequency sensor data and AI outputs into a queryable columnar format, providing a dedicated interface for viewing MCAP recording files and analyzing physical environments. The project distinguishes itself as a machine learning dataset streamer, capable of feeding logged recordings directly into GPU buffers and PyTorch training pipelines without intermediate exports. It supports a high-performa

ComfyUI-3D-Pack is a suite of custom nodes for ComfyUI that enables 3D asset generation and rendering within a node-based workflow. It provides a set of tools for reconstructing textured three-dimensional meshes and volumetric scenes from single images, multi-view images, or text prompts. The system includes a Gaussian splatting generator for creating high-fidelity volumetric 3D scene representations and a multi-view image generator to produce consistent image sets for reconstruction. It also features a single image 3D mesh tool to build geometry from a single 2D source. The toolset covers 3

This project is a creative coding showcase and interactive 3D portfolio template. It utilizes JavaScript and ThreeJS to render a navigable browser environment for presenting professional projects and digital artwork. The project implements a WebGL interactive gallery and immersive digital showcases. These environments use hardware-accelerated graphics to provide 3D navigation and creative web animations. The technical implementation includes a 3D scene with camera movement and lighting, supported by GLTF model loading and raycaster-based interaction. The architecture employs an entity-compon

mini-tokyo-3d is a 3D transit map visualization system that renders public transport networks and vehicle movements in real time using open data. It functions as a real-time transit tracker and an interactive transport route finder, providing a WebGL map embed that can be integrated into web pages and external applications. The system features a multilingual transit interface that translates transport identifiers and navigation elements into multiple languages. It tracks vehicle positions by simulating movements based on live timetables and service delay information. The project covers publi

react-native-godot is a communication layer and embedding system that integrates the Godot game engine into cross-platform mobile applications. It allows Godot game scenes and logic to be rendered as interactive visual components within a mobile user interface. The project provides a threaded logic bridge that executes engine functions on dedicated background threads using worklets. This ensures that game engine operations do not block the main application user interface. The system covers engine lifecycle management, including the ability to start, stop, and pause instances to load differen

PyTorch3D is a 3D geometric deep learning library and mesh processing toolkit designed for learning from point clouds and complex 3D surface geometries. It provides a collection of reusable components and data structures for deep learning with 3D data, including a framework for training and evaluating neural radiance fields to enable photorealistic view synthesis. The project features a differentiable 3D renderer that converts meshes and point clouds into 2D images while allowing gradients to flow back into the geometry and textures. This enables 3D shape optimization, where mesh geometry, te

gsplat is a high-performance differentiable rasterization engine for 3D Gaussian splatting, designed for real-time novel view synthesis from 2D images. It provides a complete pipeline for reconstructing 3D scenes by optimizing differentiable Gaussian representations, training models from COLMAP-processed captures or proprietary device files, and generating new viewpoints through a CUDA-accelerated rendering backend. The framework distinguishes itself through memory-optimized CUDA kernels that reduce training memory usage by up to 4x compared to standard implementations while matching publishe

This project is a frontend visualization library and gallery of interactive web examples. It provides a collection of implementations that demonstrate advanced visual effects through the use of stylesheets, canvas drawing surfaces, and three-dimensional graphics libraries. The collection specifically features implementations for visualizing artificial intelligence outputs and complex data patterns. It includes specialized galleries for three-dimensional scenes and spatial objects, as well as a showreel of stylistic motion effects and interface designs. The library covers a broad range of ren

GPAC is an open-source multimedia framework built around a pluggable filter graph pipeline, where modular processing units called filters connect into a directed graph to handle media workflows. At its core, the framework centers all media packaging and manipulation on the ISO Base Media File Format (ISOBMFF), with specialized tools for reading, writing, fragmenting, and encrypting MP4 and related containers. It also provides a declarative scene graph composition system for describing interactive multimedia scenes using MPEG-4 BIFS, X3D, SVG, or VRML syntax, alongside a hardware-accelerated re