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Free, immediately usable and not interested in your email address. A shrinking category, which is why it gets its own page.
1,232 sites · page 26 of 26
Over a hundred solitaire variants with proper undo, statistics and card backs from 2007. Still the most complete one going.
Look out of a stranger's window somewhere else in the world for as long as you like, then swap to another one.
The free, open-source answer to GeoGuessr, with unlimited rounds, a daily challenge and multiplayer that costs nothing.
Guess the country from its silhouette alone, with each miss handing you the distance and compass bearing to the real answer.
Live counters for population, emissions, water use and books published, ticking faster than is entirely comfortable.
A browser planetarium stitched from real survey data, letting you pan the whole sky in visible light, infrared or radio.
Drag a hundred colour chips into one perfect gradient. The score tells you how good your colour vision actually is.
Real-time fractal zoomer ported to the browser, smooth enough that the boundary keeps unfolding as fast as you dive.
Recordings of very nearly every bird call on earth, uploaded by amateurs and searchable by species, country and even call type.
One expanding circle to breathe along with, adjustable to box breathing or 4-7-8, and nothing else on the page.
Stick figures on romance, sarcasm, maths and language, with a second joke in the alt text of every single strip.
A vast, barely filtered pile of browser games including a great many Flash-era oddities kept alive by an emulator.
Widely reckoned the strongest reverse image search for faces, places and heavily cropped photos. Worth trying when TinEye finds nothing.
Unicode styling for places that forbid formatting, so bold and italic survive a paste into a profile bio.
Old Faithful on a live feed, plus static cameras on the geyser basin and the north entrance, run by the National Park Service.
Nonprofit solutions journalism on climate, housing and democracy — more sober than cheerful, but pointed the same way.
Two decades of first-person hauntings submitted by the public, filed by country and picked apart politely in the comments.
Infinite shared canvas of plain text where anyone can type anywhere. Scroll far enough and you find things nobody meant you to read.
The Norwegian met office's forecast, famously accurate across Scandinavia and unusually calm about admitting uncertainty everywhere else.
Piles combining diacritics onto every character until your text bleeds into the lines above and below it.
Draw mirrors and walls, then let a raytracer slowly paint the light bouncing between them until the image resolves.
The same deep management sim rebuilt for American football, baseball and hockey, all free and all running in the browser.
Two minutes of mental arithmetic at whatever difficulty you set, boiled down to a single number. Trading desks drill on this one.
You can do anything at Zombo.com. The welcome message has been loading since 1999 and it has never once explained itself.
Gather resources by day, build a base, then watch the zombie wave test every wall you decided to skimp on.
Top-down battle royale for a hundred players with a full match inside five minutes, no download and no launcher to update.
Newborn animals from zoos and aquariums worldwide, with their names, weights and the keepers' notes attached.
Satellite imagery refreshed through the day, with storm tracks, wildfire hotspots and rainfall radar layered over the top of it.
Feeds your own video call bad audio — echo, crying baby, wind — until everyone agrees the connection is the problem.
The sequel quilt, darker and stranger than the first, still folding into itself with no end and no explanation.
Real research that needs human eyes: classify galaxies, transcribe ships' logs or count penguins, and end up in a published paper.
A space shooter where you destroy incoming words by typing them, and rising panic is the entire difficulty curve.