Tech
1,683 interactive pages · most loved first · page 50 of 71· Tonble one of these
Robot Dance
A playful browser toy with dancing robots that you can fling around the screen, then watch them keep on dancing as if no…
Robotics101
A set of interactive visual tools for learning key robotics concepts such as translation and rotation, so you can see th…
Rockstar
An esoteric programming language whose programs read like 1980s hard rock power ballads, with a try-it-online editor and…
Roland50.studio
A browser-based synth studio from Roland and designer Yuri Suzuki that emulates the sound of Roland's most famous instru…
rot8000
Explains and demonstrates rot8000, a Caesar-style cipher that shifts every Unicode character 0x8000 places, turning plai…
Rothko Me
A small experiment that uses CSS filters to conjure glowing Mark Rothko-style color field paintings in the browser, with…
Routora
A route optimization tool powered by Google Maps that reorders multiple stops into the fastest possible order, handy for…
RSS Anything
Paste the address of any website with a list of links and get back an RSS or Atom feed for it, so you can follow sites t…
rubber duck
A rubber duck that listens: explain your problem out loud and it nods, listens and sometimes answers back, a playful tak…
RunJS Playground
An online JavaScript playground that runs your code instantly with live feedback, handy for learning the language and pr…
Rustween
An animated visual reference of easing functions, showing how objects accelerate and decelerate over time, built in Rust…
Rutt-Etra-Izer
A WebGL tool that turns images and video into scan-line landscapes in the style of the Rutt-Etra video synthesizer, with…
Ryder Ripps
A set of browser instruments and tools that bring vintage music machines back to life, including a playable EMS VCS3 syn…
ryOS
A retro desktop operating system recreated in the browser, with draggable windows, apps, a Finder, music and games, buil…
SadServers
A collection of Linux troubleshooting scenarios where you get a broken server and must debug it, like LeetCode for sysad…
Sakura Software
A collection of simple, free online tools for encoding, decoding, calculation, and conversion, assembled by one develope…
Same Energy
A visual search engine for finding beautiful images, from art and photography to decor, by browsing from one picture to…
Samuel
Say something into your mic and a model controls Pink Trombone, a silly simulated mouth and throat, to parrot it back -…
SankeyMATIC
An online Sankey diagram builder where you type flows as plain text and get a clean, customizable flow diagram you can e…
Satellite Map
A live 3D map of more than 30,000 satellites orbiting Earth, with Starlink trains, space stations, rocket bodies, and pa…
Satmap
A real-time 3D satellite map that tracks the ISS, space stations and whole constellations from live orbital data, so you…
Sava OS
A desktop operating system interface that runs inside your web browser, with windows, apps, and a familiar desktop layou…
Scale-A-Tron
A mapping toy from Stamen where you draw a shape on one map and the satellite imagery inside it is copied and scaled ont…
SCALGO Live
An interactive map of near-global flooding and surface-water analysis that shows how Earth's topography shapes rivers, l…
Stumble onto more like this
One click takes you to a page you didn't know you were looking for. Rate it and the next one lands closer to your taste.
Add to Browser — it's freeWorks in Chrome, Edge and Brave. No account needed.