Directory
Published directory entries matching your search.
Space Atlas is a free, interactive 3D map of tracked satellites and rocket bodies orbiting Earth, described as covering objects from Sputnik in 1957 to today. It displays about 22,242 objects in orbit and offers real-time tracking, a timeline scrubber, and a view of satellites passing over the user's location. Orbits are approximated from the public CelesTrak catalog.
SpaceSim is a free 3D space simulator that runs in a browser. It offers travel across the Solar System, time changes, source-backed worlds and postcards, along with journeys such as a grand tour of the Solar System, an ISS trajectory view and a procedural stellar laboratory for known stellar objects.
Space Time is a browser-based 3D universe explorer built from astronomical catalogs, telescope surveys and computed motion. It covers the solar system, stars, deep-sky objects and the observed cosmic web in one continuous view, with no account required. It is free and requires no download.
A website offering a real-time statistical simulation of births, deaths, and world population changes on an interactive 2D map and 3D globe. It also includes a personal Life Arc estimate based on age and a simplified U.S.-style actuarial curve, described as a broad statistical illustration rather than an individual or medical prediction. The page is labeled Beta and notes it is best viewed on desktop.
Web Game Dev is a work-in-progress collection of resources, a guide and a newsletter about building games in JavaScript. It covers techniques and tools for 2D and 3D games and visual experiences, including WebGL, Three.js and React. The site states that it currently contains many placeholders and unredacted content.
VulkanGuide is a work-in-progress guide to the Vulkan graphics API that focuses on dynamic rendering as a base for game engine code. It uses C++20 and Vulkan 1.3, covers initialization, compute shaders, mesh drawing, textures and GLTF scene loading, and targets readers who already know 3D graphics basics. An older version covers Vulkan 1.1.
A step-by-step guide to fragment shaders by Patricio Gonzalez Vivo and Jen Lowe. It covers topics such as shaping functions, colors, shapes, matrices, patterns, noise, fractals, image processing and 3D graphics, with examples and a glossary. It is available in several languages, including English.
A site that serves the version 5 KiCad libraries, providing schematic symbol libraries, PCB footprint libraries and 3D model data. The archived libraries are described as old, out-of-date and no longer maintained, with newer versions available from the KiCad website and GitLab. Users can clone the libraries with Git or SVN to receive updates.
3D Periodic Table is an educational resource for documentaries, courses, books, reference material, or self-learning.
A 3D visualization of the periodic table with a table view shown initially and an atomic view reached by clicking each element. The atomic view uses a 2D Bohr model representation with electrons rotating in a plane.
My Balsa & Glass Workshop is a personal site describing RC Balsa model aircraft building, stained glass artistry, and 3D modeling and printing. It includes scratch-built balsa RC model build descriptions, photo galleries, and links to plans and modeling resources. The builder states 37 years of RC model experience.
Zygote Body is a free online 3D anatomy atlas for viewing and isolating human anatomy structures. It offers navigation, layer controls, selection and search, and different models. Paid Lite, Premium and Professional plans add tools such as saved scenes, annotations, slicing and quizzes.
LunchBox Sessions is an industrial training library focused on hydraulic and electrical troubleshooting. It offers lessons, 3D videos, quizzes, puzzles and interactive Live Schematic simulations covering basics, schematic reading, components and measurements. A Standard Membership costs $29/month or $249/year and includes unlimited access to all materials. An Instructor Membership is required to show materials to other people.
Zperiod is an interactive periodic table covering 118 elements, with 3D atom models, ions, chemistry tools, and worksheet practice. It is presented as a desktop-only experience with an iPhone variant directing users to open it on a computer. Units include temperature, density, and energy.
WebODM is free and open source drone mapping software that runs on a computer, including offline. It generates georeferenced orthomosaics, point clouds, digital elevation models, textured 3D models and gaussian splats from aerial images, with support for volume and area measurements and NDVI indexes.
Ptable is an interactive periodic table of the elements showing names, electrons and oxidation states. It offers visualization of trends, 3D orbitals and isotopes, and allows users to mix compounds, with fully descriptive writeups.
OpenDroneMap is drone mapping software that generates maps, point clouds, 3D models and DEMs from images taken by any camera in any orientation. Its ecosystem includes ODM, a command line toolkit for processing aerial images from drones, balloons or kites, plus NodeODM, CloudODM, PyODM, ClusterODM and other projects.
MolView is a chemistry web tool for sketching and viewing small molecules, with live 3D synchronization while sketching and multiple structures side by side. It includes Lewis structures, reaction diagrams, spectroscopy data, crystallography loading, protein viewing and calculations such as MEP surfaces and energy minimization. A new version has been developed since 2024, while an older app remains available.
KiCad is an open source PCB design and electronics CAD suite for Windows, macOS and Linux. It includes a schematic editor, a PCB editor and a 3D viewer, and is described as forever free. The schematic editor supports hierarchical designs and includes an integrated SPICE simulator and electrical rules checker. Documentation is written and maintained by a volunteer docs team.
Horizon EDA is a free and open source electronic design automation package for printed circuit board design. It allows users to maintain and share a pool of parts, draw schematics, and design, 3D-preview and export PCB layouts for manufacturing. It runs on Linux and Windows.
Maxima is a free, open-source computer algebra system written in Lisp with an emphasis on symbolic computation. It is based on the DOE-MACSYMA system and licensed under the GPL. Its capabilities include symbolic integration, 3D plotting, solving differential equations, manipulation of symbolic and numerical expressions, and high-precision numerical calculations. It runs on Windows, Linux, and Mac, with both terminal and notebook interface options, and has an active user community with frequent updates.
GeoGebra is an interactive mathematics platform for teaching and learning. It provides free digital tools including calculators, graphing, geometry, 3D exploration, and collaborative whiteboard features. The platform offers ready-made educational resources for grades 4 to 12, tools for users to create custom materials, and classroom functionality for teachers to track student progress and provide feedback. It integrates with various learning management systems and is used by teachers and students at school and university levels.
Desmos Studio develops free digital math tools, including Graphing, Scientific, Geometry, and 3D Calculators, as well as Notebook. The tools are available for exploration, with examples provided for user inspiration.
WikiSpaces 3D is a platform offering a rich collection of user-contributed virtual scenes from around the world. Users can view these scenes and embed them in any project for free.
