Education
5,614 pages · most loved first · page 141 of 234· Tonble one of these
Orcasound
A live-listening network of underwater hydrophones in the Salish Sea where anyone can tune in and help detect passing or…
Ordinary Philosophy
A blog dedicated to philosophy in the public square and the history of ideas that change the world, with accessible essa…
Organ Historical Society
A nonprofit society of pipe organ enthusiasts documenting the instrument's design, construction, and history in America.
Organic Chemistry Data
An encyclopedic collection of reference data, resources, and links for organic chemists, curated by the ACS Division of…
Organic Syntheses
A free archive of peer-reviewed, independently checked procedures for making organic compounds, a long-running reference…
Origami by Michal Kosmulski
A personal origami site with a big photo showcase of folded models, free folding instructions and diagrams, and news suc…
Origami Club: Animals
A huge free index of animal origami models - cats, frogs, cranes, dinosaurs and more - each with step-by-step diagrams a…
Origami Database
A searchable database of nearly 50,000 origami models, with publications, creators and articles to browse for folding id…
Origami.me
A guide to paper folding with free origami diagrams, step-by-step tutorials, and galleries ranging from beginner to comp…
Origin Myth Map
An interactive world map of creation myths: browse how cultures explained the beginning of everything, from worlds wrest…
Origin Story: Where Did Skiing Begin?
A look at the ancient origins of skiing, from Stone Age rock art and the hunters of China's Altai Mountains to Scandinav…
Original Poems
A public domain poetry database you can search by poet or poem name, collecting a wide variety of poetry types in an ope…
Orion Philosophy
A site publishing clear, well-illustrated explainers on classic philosophical debates like free will, determinism, and t…
Orion Realms
A browser explorer of 220 real star systems, inspired by NASA visualization software, mixing actual astronomy data with…
Orpheus' Hacky Guide to Writing a Programming Language
A beginner-friendly guide written by a 17-year-old that walks you step by step through building your own programming lan…
Oryx
A military analysis blog known for its photo-documented tallies of equipment losses in the war in Ukraine, with detailed…
Osirisnet
Detailed virtual tours of ancient Egyptian tombs, with photographs, plans, and translations of their painted inscription…
Oskar Schlemmer
The estate archive of Bauhaus painter, sculptor and choreographer Oskar Schlemmer, with his life and work, the costumed…
OSS Simple Sabotage Field Manual
Excerpt from a declassified 1944 OSS field manual teaching citizens to sabotage organizations by insisting on committees…
Ostia Antica
An illustrated guide to the ancient Roman port city of Ostia, covering its buildings, mosaics, and everyday commercial l…
oTranscribe
A free web app for transcribing recorded interviews, with a built-in audio player, keyboard shortcuts for pausing and re…
Oughtred Society Archive of Collections
The Oughtred Society archive of slide rule collections, where members document hundreds of rules, calculators and instru…
Our Documents
A US government site presenting 100 milestone documents of American history, from the Declaration of Independence to mod…
Our Friend The Computer
A podcast exploring alternative computing histories, from forgotten machines to the people and communities left out of t…
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.