No sign-up, no email: 338 sites

Fly out through our stellar neighbourhood, one star at a time

Slide tiles, double numbers, lose an hour to one more go

Grant Sanderson's maths lessons, with the visuals inline

Windows 98 rebuilt in JavaScript, down to the fonts

Everything about the curve behind every vector graphic

Build your own weather out of ten ambient sliders

The flight tracker that filters nothing out of the sky

One long essay a day, on the questions without answers

The flying toasters screensaver, rebuilt in pure CSS

The sky atlas professional astronomers use, in a tab

Browse by genre, mood, decade or who played on it

Fan-made soundscapes of fictional rooms you can sit in

Type your address, watch it drift 750 million years

Machines taken apart in animation, layer by layer

Read tomorrow's physics papers before they're published

Which asteroids would pay for the trip out to reach them

One space image a day, explained by a working astronomer

A guidebook to the places no guidebook mentions

Trim and edit audio without installing anything

Filter by genre, format and location, then simply listen

The best interactive explainers anyone is making

A chiptune sequencer that fits a whole song in a URL

The etymology and history of first names, worldwide

Maths taught as intuition first, notation afterwards

Every natural history book, scanned by the world's museums

Weather radar, counting the birds that migrate overnight

Three rules are all a flock of birds needs

Sixteen strange brushes and almost no control

A cat plays whatever instrument you hit keys for

An 1847 geometry book where colour replaces the labels

Every GIF at once, with a soundtrack, on purpose

A collage built entirely from salvaged GeoCities parts

The American statistical record, queryable directly

Click a grid of squares and it becomes a melody

A world map where every pin is a field recording

Parody of viral listicles, taken far past reason