An encyclopedic collection of mathematics resources covering arithmetic, algebra, geometry, probability and trigonometry, with games, problems, puzzles and articles. It was created in 1996 by Alexander Bogomolny, who maintained it until July 2018. The Wolfram Foundation was asked to continue maintenance and updates.
Converter NOW: Unit Converter is an open source Android application for converting units and currencies. It offers real-time conversion with all other units as the user types, customizable unit ordering, and an integrated calculator. It supports 200+ units of measurement and 30+ currencies, with currency exchange rates updated daily.
Easy Auscultation is an online educational resource for learning heart and lung sounds. It offers lessons, practice drills, quizzes and a reference guide covering heart and lung sound auscultation, along with a blood pressure cuff simulator and medical terminology guides. The site states that its lung sounds training resources are free.
BOMwiki is a free bill-of-materials encyclopedia that breaks products into their component parts, down to individual screws, bearings and cells. Anyone with an account can edit pages, and new contributors' changes are reviewed before going live. Each page displays a verification status.
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.
A browser-based simulation of bouncing balls with adjustable radius, wall elasticity, air resistance and gravity. Balls can be added by clicking or dragging, and can be free, fixed, connected or attached with a spring. Links to a GitHub repository and English, Traditional Chinese and Simplified Chinese versions are provided.
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.
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Converter NOW: Unit Converter is an open source Android application for converting units and currencies. It offers real-time conversion with all other units as the user types, customizable unit ordering, and an integrated calculator. It supports 200+ units of measurement and 30+ currencies, with currency exchange rates updated daily.
Easy Auscultation is an online educational resource for learning heart and lung sounds. It offers lessons, practice drills, quizzes and a reference guide covering heart and lung sound auscultation, along with a blood pressure cuff simulator and medical terminology guides. The site states that its lung sounds training resources are free.
BOMwiki is a free bill-of-materials encyclopedia that breaks products into their component parts, down to individual screws, bearings and cells. Anyone with an account can edit pages, and new contributors' changes are reviewed before going live. Each page displays a verification status.
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.
A browser-based simulation of bouncing balls with adjustable radius, wall elasticity, air resistance and gravity. Balls can be added by clicking or dragging, and can be free, fixed, connected or attached with a spring. Links to a GitHub repository and English, Traditional Chinese and Simplified Chinese versions are provided.
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.
