Education
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Simon Tatham's Portable Puzzle Collection
A collection of forty small one-player logic puzzles, from Sudoku variants to circuit-untangling, all playable free in t…
Simonetti Historic Tuba Collection
A private collection of historic tubas catalogued instrument by instrument, with photos and notes on makers, keys and va…
Simple CPU Design
A hobbyist's tour of designing a tiny CPU from scratch, with FPGA builds, blinking LEDs, retro computing history and ste…
Simple Highway Simulator
A little traffic simulator of cars on a highway where you can tweak parameters or stop any car and watch the jam ripple…
Simple Living Creative Learning
A homemaking and homeschooling blog with simple living ideas, creative learning activities and free printables for famil…
Simply Psychology
A reference site explaining core psychology theories, studies, and famous experiments in clear language for students and…
SimplyScripts
A free archive of movie, television, radio and anime scripts with a searchable database, plus a discussion board for scr…
SineRider
A game about love and graphing, built by teenagers, where you write mathematical functions to guide a rider through leve…
Sing Out!
The folk music magazine and nonprofit founded in 1950, with news, reviews, song archives, and features preserving tradit…
Singingbanana
Mathematician James Grime's site of recreational math curiosities, from intransitive dice to prime number oddities, writ…
Sinosplice
A blog about Mandarin Chinese that tackles key linguistic and cultural issues, with practical insights for anyone learni…
Sistine Chapel Virtual Tour
A virtual tour from the Vatican that lets you look around the Sistine Chapel and up at Michelangelo's frescoes in 360 de…
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Situationniste Blog
A book collector's blog showcasing rare Situationist books, manuscripts, posters and ephemera, with photos and notes on…
Six Degrees of Wikipedia
Finds the shortest chain of hyperlinks between any two Wikipedia pages, turning the encyclopedia into a game of surprisi…
Sixty Symbols
Short, quirky videos from University of Nottingham physicists explaining the symbols and puzzles of physics and astronom…
Size It Up
A daily visual estimation game: resize five target objects until they look right beside a known reference, scoring up to…
Skeptical Inquirer
The magazine of the scientific skepticism movement, publishing investigations that examine extraordinary claims with rig…
Skeptical Science
A reference site that examines what peer-reviewed research actually says about climate change, methodically rebutting ne…
Skeptoid
A podcast and companion site applying critical thinking and scientific evidence to debunk urban legends, myths, and popu…
Sketchplanations
A growing collection of simple sketches that explain ideas from science, creativity, psychology, and design, one clear d…
Skin Cancer Quiz
An interactive quiz by a consultant dermatologist where you judge real skin lesion photographs as concerning or not and…
Skin Cancer Quiz
A quiz built on real skin lesion photographs where you decide whether each one is concerning, then get instant feedback…
Skullsite
A huge personal collection of bird skulls, photographed and identified species by species, with skeletons, 3D models and…
Sky Lights
An astronomy blog about the night sky and the distant objects seen by telescopes like the James Webb, written for curiou…
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