Animalia is an online animal encyclopedia for learning about animals, with sections for mammals, birds, reptiles, amphibians, mollusks, fish and insects. The site also offers collections, an animal-of-the-day feature, and companion projects Animalia Pets and Dinosauropedia. Supporters can subscribe on Patreon for an ad-free experience.
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Biology Online is described as a database of biology terms and topics, offering search over terms, news and articles. The site states it has existed since 2001 and addresses biology questions from professors, students and professionals.
Engineers Edge is an engineering reference site offering calculators, charts and tools for structural, mechanical and design work. It includes beam and stress calculators, fastener and bolt design resources, flat plate deflection equations, and applications such as a 2D statics modeler, GD&T writer and gear builder. Premium design and engineering spreadsheets require an annual membership.
Erich's Packing Center is an educational resource for documentaries, courses, books, reference material, or self-learning.
PicaSim is a flight simulator for radio controlled aircraft, focusing mainly on gliders with some other aircraft. It is available free on Android, Apple/iOS and Windows, and development is on hold.
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.
Park School Mathematics is a site presenting a series of mathematics books, from Book 1: Reasoning and Proving through Book 10: Functions and Models II, plus additional custom books. Book pages list lessons covering topics such as combinatorics, linear equations, quadratic models, graph theory, geometric proof, circular functions, algorithms, logarithms and recursion.
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Biology Online is described as a database of biology terms and topics, offering search over terms, news and articles. The site states it has existed since 2001 and addresses biology questions from professors, students and professionals.
Engineers Edge is an engineering reference site offering calculators, charts and tools for structural, mechanical and design work. It includes beam and stress calculators, fastener and bolt design resources, flat plate deflection equations, and applications such as a 2D statics modeler, GD&T writer and gear builder. Premium design and engineering spreadsheets require an annual membership.
Erich's Packing Center is an educational resource for documentaries, courses, books, reference material, or self-learning.
PicaSim is a flight simulator for radio controlled aircraft, focusing mainly on gliders with some other aircraft. It is available free on Android, Apple/iOS and Windows, and development is on hold.
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.
Park School Mathematics is a site presenting a series of mathematics books, from Book 1: Reasoning and Proving through Book 10: Functions and Models II, plus additional custom books. Book pages list lessons covering topics such as combinatorics, linear equations, quadratic models, graph theory, geometric proof, circular functions, algorithms, logarithms and recursion.
