Directory
Published directory entries matching your search.
A website offering a real-time statistical simulation of births, deaths, and world population changes on an interactive 2D map and 3D globe. It also includes a personal Life Arc estimate based on age and a simplified U.S.-style actuarial curve, described as a broad statistical illustration rather than an individual or medical prediction. The page is labeled Beta and notes it is best viewed on desktop.
The World Cube Association governs competitions for mechanical twisting puzzles, known as twisty puzzles, including the Rubik's Cube. A selection of these puzzles are official WCA events, and the site provides competition information, records and regulations.
The World Data Center for Solar-Terrestrial Physics, Moscow, a division of the Geophysical Center of the Russian Academy of Sciences, has existed since 1956. It collects, stores and disseminates data on solar-terrestrial physics disciplines, with online data and data search. Its data can be used freely for scientific research and educational purposes.
World Wide Telescope is a GitHub repository or organization with source code, releases, documentation, or project resources.
Write & Improve is a free service from the University of Cambridge for learners of English to practise written English. Users submit written work and receive feedback within seconds on spelling, vocabulary, grammar, and general style. It offers hundreds of tasks at all levels, and results are linked to the CEFR.
Wumbo is a math reference site for students, teachers, and enthusiasts. It organizes core concepts, worked examples, formulas, functions, a glossary, notation, operators, symbols, and videos, including a video on quaternions implemented in Python. It offers a contributing membership that funds future videos and resources.
WW2 in 100 Objects is a virtual online exhibition of Second World War-related items. The physical exhibition was on display at Kunsthal Rotterdam until 5 May 2014. The virtual version allows remote access to the exhibition, with full-screen mode recommended for the best viewing experience.
x86re hosts a series of reverse engineering articles. Part 1 gives a brief introduction to RE, executables, compiling, 32-bit x86 syntax, and stack frames. Part 2 covers Portable Executable image file headers and sections.
Xextan is a constructed language with a page of language resources. It points to a wiki and Discord server, the Xextbook as the main learning resource, a dictionary and root listings, texts, and several parsers.
A list of Japanese learning resources for beginners and advanced learners, covering dictionaries, vocabulary, grammar, reading, media, podcasts, games, software and an encyclopedia. Some sections are marked as coming soon.
YellowBridge is an online bridge to Chinese language and culture, offering resources for learning Mandarin and cultural context for understanding the language. Its tools include a Chinese-English dictionary, character dictionary and etymology, Chinese flashcards, a memory game, HSK preparation, a popup translator, pinyin resources, an animated stroke order guide and a Chinese reading center.
Yeolpumta is a study-focused service operated by Pallo Inc, located in Gangnam-gu, Seoul, Republic of Korea. It describes itself as the beginning and end of studying, and provides public contact details for support via email and telephone.
A website dedicated to language learners that hosts FSI, DLI and Peace-Corps courses, plus Shtooka audio collections and Cortina courses. It also offers tutorials for importing vocabulary lists, digitizing documents and recording word or phrase lists. The site states the FSI and Peace-Corps parts are finished and DLI is on the way.
Yokai.com is an illustrated database and encyclopedia of Japanese folklore featuring ghosts, monsters, and legendary figures. Entries are based on Japanese sources including books, paintings, scrolls, prints, and oral tradition, with text and illustrations by Matthew Meyer. The site is presented ad-free, pop-up free, and paywall free.
Yomitan is a free browser extension that provides pop-up dictionary lookups while reading. It shows definitions, word frequencies, native audio and example sentences, and can send lookups to Anki as flashcards. The extension supports Chrome, Firefox and Edge and runs on Android devices.
YouGlish is a website for learning English pronunciation using clips of real people speaking. Users search words, phrases, word classes, gender and context to hear examples in real English. The site lists multiple languages and reports over 100 million clips.
Reddit link points to a Reddit community or thread with discussion, guides, troubleshooting, or shared resources.
YT is a YouTube video, playlist, or channel resource for watching related tutorials or media.
YT Video Essay Hall of Fame is a public Google document or spreadsheet containing organized links, notes, data, or resources.
Z-Tonnetz is a free browser-based beta visualization of a neo-Riemannian Tonnetz in 3D. It plays any MIDI file or a user's keyboard and shows chords, voice leading and key relationships in real time. The page notes that these are highly experimental features and some may not work as intended.
A downloadable MIDI utility for learning basic piano scales and chords at the user's own pace with a MIDI or QWERTY keyboard. It offers Quiz and Practice modes, extra options such as Ping Pong, Hard and Shuffle modes, built-in piano sounds and multiple languages. The cross-platform app is open-sourced under the MIT License.
Zbib is a free online citation and bibliography generator. It supports APA, Chicago, Harvard, MLA and 10,000 additional citation styles. The service does not require user accounts, display advertisements, or local software downloads.
Zero to Nix is a guide to learning Nix and flakes. It describes core ecosystem components: Nix as a build tool and package manager, the Nix language, NixOS as a Linux distribution, and Nixpkgs as a collection of packages, libraries, and helper functions.
ZetCode is a website offering tutorials on C#, Go, Python, Java, and JavaScript, along with e-books. Its pages include C# and Python tutorial sections and a list of updates, and it notes that Jan Bodnar is the author.
