Mathispower4u is a site by James Sousa offering over 9,000 free mini-lessons and example videos, organized by course and topic. The videos are closed captioned, and the site links to YouTube playlists by course. Content covers number sense, algebra, geometry, trigonometry, calculus, statistics and other topics.
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.
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.
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.
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.
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.
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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.
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.
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.
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.
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.
