Mathematical Olympiads Discord Server (MODS) is a Discord server founded in January 2019 for Mathematical Olympiad enthusiasts of all ages to learn and socialise. Its staff post a problem-of-the-day, host monthly contests, and organise other server activities. It is part of the International Science Olympiad Discord Network.
Organic Chemistry Portal provides an overview of recent topics, reactions, and information on important chemicals for organic chemists. The site covers name reactions, protective group stability data, synthetic transformations, and article abstracts from organic synthesis journals. It also lists chemicals from suppliers and offers a chemistry tool for estimating molecular properties.
Project Euler is a series of challenging mathematical and computer programming problems. Most problems require computer and programming skills in addition to mathematical insight. The site aims to offer a platform for learning new concepts in a recreational context, and accounts can be used to track progress.
The UIUC Airfoil Data Site is a collection of airfoil coordinates and airfoil related links. Its database covers applications from low Reynolds number airfoils for UAVs and model aircraft to jet transports and wind turbines, and includes over 1600 airfoils listed alphabetically by file name.
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.
ConvertAll is a unit converter that allows combining units in arbitrary ways, including units with non-linear scales such as temperature. Units may be entered by name or abbreviation and combined with operators, and unit data includes over 500 units. A single code base runs on Linux, Windows, Android and the web.
A datasheet search service covering more than 900,000 electronic component datasheets from manufacturers. It offers technical specifications, electrical characteristics, package details and PDF documents for semiconductors, ICs, MOSFETs and other components, and allows checking equivalents with daily updates.
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Organic Chemistry Portal provides an overview of recent topics, reactions, and information on important chemicals for organic chemists. The site covers name reactions, protective group stability data, synthetic transformations, and article abstracts from organic synthesis journals. It also lists chemicals from suppliers and offers a chemistry tool for estimating molecular properties.
Project Euler is a series of challenging mathematical and computer programming problems. Most problems require computer and programming skills in addition to mathematical insight. The site aims to offer a platform for learning new concepts in a recreational context, and accounts can be used to track progress.
The UIUC Airfoil Data Site is a collection of airfoil coordinates and airfoil related links. Its database covers applications from low Reynolds number airfoils for UAVs and model aircraft to jet transports and wind turbines, and includes over 1600 airfoils listed alphabetically by file name.
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.
ConvertAll is a unit converter that allows combining units in arbitrary ways, including units with non-linear scales such as temperature. Units may be entered by name or abbreviation and combined with operators, and unit data includes over 500 units. A single code base runs on Linux, Windows, Android and the web.
A datasheet search service covering more than 900,000 electronic component datasheets from manufacturers. It offers technical specifications, electrical characteristics, package details and PDF documents for semiconductors, ICs, MOSFETs and other components, and allows checking equivalents with daily updates.
