Education
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SkyMapper Sky Viewer
An interactive sky viewer for the SkyMapper Southern Sky Survey, letting you pan across the stars and galaxies of the so…
SkyViewer
An interactive star visualization that lets you pan and zoom across the night sky and explore a catalog of around 100,00…
Slangit
A crowd-built slang dictionary organized by category and decade, tracking how informal English vocabulary shifts over ti…
Slate Star Codex
The archive of Scott Alexander's famous blog, thousands of long essays on psychology, medicine, culture and ideas, inclu…
Slave Voyages
An interactive database and map documenting more than 36,000 trans-Atlantic slave trade voyages, built from centuries of…
Slavery Footprint
An interactive survey that estimates how many forced laborers are behind the products in your life, based on what you ow…
Slice of the Solar System
A true-to-scale solar system map with live planet positions, plus a generator for infinite sci-fi systems and real ones…
Sliding Shores
An interactive 3D globe with a slider that drains the oceans down to the Mariana Trench or floods Earth up to the peak o…
Slow
Michael Nielsen collects problems that people can only solve over very long timescales and asks how to build institution…
Slow Canvas
Deep-zoom into public-domain masterpieces with guided tours of the details, real color palettes, artist timelines and mu…
SlowTube
A tool for learning songs by ear that slows down a track so you can pick out the notes, chords, and rhythms at a speed y…
SmallDollars.com
A comprehensive collector's study of United States small size dollar coins, from Susan B. Anthony to Sacagawea and Presi…
Smart Politics
Data-driven political analysis since 2006 by Eric Ostermeier, covering elections and public policy in Minnesota and beyo…
SmartDoc Pro
A browser-based writing analyzer where you paste text and get keywords, an outline, and charts on reading time, complexi…
Smarthistory
A nonprofit art history resource where hundreds of art historians explain artworks through short videos and essays, from…
Smarthistory
A free art history resource from Beth Harris, Steven Zucker and hundreds of art historians, with short conversational vi…
Smithsonian Folkways
The Smithsonian's non-profit record label, documenting folk, world, and spoken-word traditions with detailed liner notes…
Smithsonian Open Access
The Smithsonian's open access platform releasing millions of images and 3D models from its museums, archives, and librar…
SMK Open
The open collection of Denmark's national gallery, with tens of thousands of photographed artworks free to browse, downl…
SmokeLong Quarterly
A leading flash fiction magazine publishing free stories under a thousand words, often paired with author interviews and…
Snap! Build Your Own Blocks
A blocks-based visual programming language from UC Berkeley that runs in the browser, letting anyone drag blocks to make…
Snellings Museum of Sound and Vision
An online museum of home entertainment with vintage British radios, televisions, gramophones and early computers from br…
Snow Day Calculator
A snow day calculator that predicts the chance of school closures from real-time weather data once you enter a ZIP code…
So You Want to Learn Physics
Susan Fowler's self-study roadmap for learning physics from scratch, listing the math and physics textbooks to work thro…
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