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.
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.
Pteros is an educational resource for documentaries, courses, books, reference material, or self-learning.
QPaths is a tool for building visual intuition for basic quantum terms. It offers superposition paths including Bell state, GHZ state, and QFT, and directs users to BlueQubit to simulate quantum circuits.
Radiopaedia is an educational resource for documentaries, courses, books, reference material, or self-learning.
RCPlanes Online is a site about radio-controlled model aircraft. It offers a basic aerodynamics guide, a beginners' guide and useful information about RC planes. It also provides calculators for center of gravity, wing loading, motor and propeller combinations, propeller static thrust, and plane performance.
RecentlyExtinctSpecies is an educational resource for documentaries, courses, books, reference material, or self-learning.
RocketReviews is an educational resource for documentaries, courses, books, reference material, or self-learning.
Sanfoundry is an educational resource for documentaries, courses, books, reference material, or self-learning.
SatModeler is an educational resource for documentaries, courses, books, reference material, or self-learning.
School Yourself provides free interactive online math lessons and videos. Subjects include algebra, geometry, trigonometry, precalculus and calculus. The site states the lessons are free with unlimited access, and describes smart recommendations and personalized assessments.
Sectional Anatomy is an educational resource for documentaries, courses, books, reference material, or self-learning.
SeligSIM is a free RC flight simulator for Windows that also runs on Mac and Linux. It offers over 140 airplanes and 35 flying sites, with aerodynamics and physics modeling. It has been in continuous development since 2003 and was originally known as FS One.
SequenceDB is an educational resource for documentaries, courses, books, reference material, or self-learning.
Sim Flow is an educational resource for documentaries, courses, books, reference material, or self-learning.
SimScale is an educational resource for documentaries, courses, books, reference material, or self-learning.
SmartCockpit is a free online aviation library offering aircraft-type specific quizzes and information on flight operations and safety. Since 2000 it has aimed to serve professional pilots worldwide, covering topics such as human factors and type rating preparation.
Splung.com is an online physics course aimed at students studying general physics at high-school, physics A-level or the first year of university. It offers sections on mechanics, electricity and magnetism, optics, heat and thermodynamics, nuclear physics and cosmology, along with Flash simulations and a forum moderated by a qualified physicist.
Stitz Zeager Open Source Mathematics provides free and open precalculus materials, including College Algebra, College Trigonometry and Precalculus textbooks by Carl Stitz and Jeff Zeager. A Precalculus 4i edition is available free on the interactive Ximera platform. Printed desk copies are offered to Verified Teachers through openintro.org.
Synarchive helps find books, reading material, archives, or public-domain educational texts.
The Pinouts Book is a free digital book for designers and engineers, serving as a quick reference for pinout functions in electronics projects. It covers 200 commonly used components, including connectors, single board computers, dev boards, memory cards and microcontroller chips. Pages link to official datasheets and specifications, and the latest version is reformatted for A4 printers.
ThrustCurve is an educational resource for documentaries, courses, books, reference material, or self-learning.
The TIB AV-Portal is a platform for scientific videos and audios in fields including technology/engineering, architecture, chemistry, information technology, mathematics and physics. It offers services such as quoting scientific videos with persistent identifiers, curating personal film programmes, publishing videos and producing videos with support. Content includes lecture series and digitised film collections.
Tripoli Rocketry is an educational resource for documentaries, courses, books, reference material, or self-learning.
UAVs FYI is an educational resource for documentaries, courses, books, reference material, or self-learning.
