Directory
Science and mathematics collects references, databases and study material for science and maths subjects. The listings cover chemistry, physics, biology, astronomy, earth science and maths, with a mix of reference databases, course pages, calculators, simulations and self-assessment tools. Some entries are large public databases such as compound or species catalogues, and others are small teaching sites or video series. Worth checking: the level each resource aims at, the date of its data and whether the authors are named. Accuracy matters most here, so prefer sources that explain how their numbers were produced.
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.
BugGuide is an educational resource for documentaries, courses, books, reference material, or self-learning.
CESDb is the Civil Engineering Software Database, a site founded by engineers that lists free, trial or shareware civil engineering software for engineers, researchers and academics. It is described as currently listing 596 programs under 12 categories, with descriptions, screenshots and manuals where available. Programs can be downloaded for PC, Mac, Linux and other operating systems, and software reviews are provided.
CFDTool is a graphical user interface toolbox based on the FEATool Multiphysics toolbox for computational fluid dynamics and coupled heat transfer simulations. It includes CAD geometry modeling, automatic mesh generation, postprocessing and visualization, and support for the OpenFOAM and SU2 solvers. Models can be defined once and used with the solvers interchangeably. It can be integrated with MATLAB.
Chemexper Chemical Directory is an educational resource for documentaries, courses, books, reference material, or self-learning.
chemguide is a site aimed at helping advanced level chemistry students understand chemistry. Its menu covers atomic structure and bonding, inorganic chemistry, physical chemistry, instrumental analysis, basic organic chemistry, organic reaction mechanisms, chemistry calculations and textbook suggestions. A section for 14 to 16 year old students on courses such as GCSE is still being written.
ChemicalAid is an educational resource for documentaries, courses, books, reference material, or self-learning.
ChemistrySteps is an educational resource for documentaries, courses, books, reference material, or self-learning.
ChemistryTalk is an educational resource for documentaries, courses, books, reference material, or self-learning.
ChemQuiz is an educational resource for documentaries, courses, books, reference material, or self-learning.
ChemSpider is an educational resource for documentaries, courses, books, reference material, or self-learning.
ChemTube3D is an educational resource for documentaries, courses, books, reference material, or self-learning.
Colorado Chemistry Simulations is an educational resource for documentaries, courses, books, reference material, or self-learning.
CommonOrganicChemistry is a website that presents reaction mechanisms, procedures, and details for commonly encountered organic chemistry reactions. It also lists common reagents, purification resources and links, jobs, internships, and chemical suppliers, CROs and CMOs.
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.
Corca is a collaborative math editor. It lets users type mathematical expressions without syntax or coding, with input behaving like search. Multiple people can work on math together in real time, and equations export to LaTeX for copying or document download.
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.
Cyberbotics is an educational resource for documentaries, courses, books, reference material, or self-learning.
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.
Deployed Medicine is a research and development activity sponsored by the Defense Health Agency in partnership with the Joint Trauma System and Committee on Tactical Combat Casualty Care. Since 14 December 2023, users must be signed in to access its content.
Doc Brown's School Science Revision Notes and Quizzes is a science revision website that began in 2000 as a chemistry site and has since expanded. It offers revision notes and quizzes for biology, chemistry and physics at lower secondary, GCSE, IGCSE and advanced level, keyed to UK exam boards including AQA, Edexcel, OCR, WJEC and CCEA.
eBird is an educational resource for documentaries, courses, books, reference material, or self-learning.
eCalc provides simulation tools for electric drives, including calculators for airplane propellers, multirotors, helicopters, EDF jets, and electric cars. The site lists a motor database and a restricted free demo version with reduced functionality and partial database access. It has been presented as offering reliable predictions since 2004.
EduMedia is an educational resource for documentaries, courses, books, reference material, or self-learning.
