Directory
Published directory entries matching your search.
IEDA2 is a collaborative data infrastructure of three complementary data systems: EarthChem, LEPR/traceDs and SESAR. It supports geoscience researchers in sharing and accessing sample data following FAIR data principles, and its mission is open, reproducible and transparent science practices. Components include the EarthChem Library data repository and PetDB geochemical data access.
IELTS Liz is a free IELTS preparation website offering practice lessons, topics, model answers and test tips across listening, reading, writing and speaking. It also provides information about the IELTS test, band scores and test-day advice. Lessons are described as targeting band scores 7, 8 and 9.
An Information is Beautiful graphic reviewing meditation and mindfulness, including how it is practiced, its different types, and scientific research on effects on the body and brain. The page was compiled from many sources and over 75 scientific studies, with the evidence presented in one graphic and datasheet.
Interviews by AI is an AI-powered interview preparation service. It turns a job description into generated behavioral and technical interview questions that users practice out loud or in writing, then receive instant feedback built on frameworks such as STAR, along with a sample answer.
Interviews Chat is an AI interview assistant that provides real-time suggestions and live transcription during interviews. It offers AI interview preparation and mock interview practice, and responds to technical and behavioral questions in formats such as STAR answers, bullet points and follow-up questions. A Chrome extension can connect to a browser tab with a task and generate a solution with reasoning.
A SpaceX simulator that familiarizes users with the controls of the interface NASA astronauts use to manually pilot the Dragon 2 vehicle to the International Space Station. Users practice rotation and position controls, and docking succeeds when all green numbers are below 0.2 and the rate is below -0.2 m/s.
JapaneseTest4You is a website offering free online Japanese practice tests. It provides JLPT Kanji, grammar, vocabulary, reading and listening tests in all levels, along with vocabulary, grammar and kanji lists, infographics, flashcards and ebooks.
JavaScript Quiz offers interactive quizzes and practice challenges for testing JavaScript knowledge. It presents 10 random questions, and after a question is answered a button appears for reading the explanation.
Jlpt N3 is a website listing JLPT N3 exam practice tests, organized into letters and vocabulary, grammar and reading comprehension, and listening sections. It also offers mock tests for JLPT levels N1 through N5. A notice states the site no longer publishes official JLPT examination questions and instead provides newly created mock tests.
KeyCombiner is a web service for organizing, learning, and practicing keyboard shortcuts. Users can import shortcuts from a public database into personal collections, practice them with spaced repetition, and take curated courses and lessons. A desktop application offers instant shortcut lookup on Windows and Linux.
KeyZen MAB is a browser-based typing practice tool by Adam Gradzki, version 4.2. It offers monogram, bigram and trigram ngram modes, with a visualization of expected ngram performance. Users can load a corpus and delete a whole word with Control + Backspace (Windows/Linux) or Option + Backspace (macOS).
LangMagic is an adaptive language learning platform that provides reading, listening, and grammar practice tools for approximately 30 languages, covering A1 to C2 proficiency levels. It offers two core products: the Endless Book, an adaptive reader that adjusts difficulty and provides word definitions and audio, and a content portal with a library of adaptive learning materials for learners and educators. The platform adjusts to each user's pace and chosen content genres.
Browser tool for learning languages with subtitles, translations, and video-based practice.
Free audio language courses focused on intuitive explanations and listening practice.
Laoshi is a Chinese language learning service built around smart flashcards and a spaced repetition system for studying Mandarin vocabulary and characters. It offers practice in reading and writing in the app, ready-made HSK word lists, goal setting and progress tracking. A family of digital tools includes a classroom, dictionary, grammar library, pinyin converter and Chinese name generator.
Laws of UX is a collection of best practices that designers can consider when building user interfaces. It presents named principles such as the Aesthetic-Usability Effect, Choice Overload, Chunking, Cognitive Bias, Cognitive Load and the Doherty Threshold, each with a short explanation.
LearnCpp.com is a free website devoted to teaching programming in modern C++. Its lessons walk through the steps needed to write, compile and debug C++ programs. No prior programming experience is necessary, though programmers of all levels may benefit from the best practices, tips and insights. Chapters cover getting started, basics, functions, debugging, data types, and more.
Supports teaching, studying or skills practice with AI-guided learning tools.
A language-learning service offering audio flashcards, games, annotated texts, writing and listening drills, and AI conversation practice across many language combinations. It includes daily email exercises and progress tests, with free and premium accounts.
Lifeprint.com hosts ASL University, an American Sign Language resource site established in 1997 by Dr. Bill Vicars. It offers free ASL lessons, a sign dictionary with thousands of videos, fingerspelling practice, and Deaf culture resources for students, interpreters, teachers, and parents of Deaf children.
Linux Roadmap is a step-by-step guide to learning Linux in 2026, hosted on the roadmap.sh platform. roadmap.sh provides community-created roadmaps, best practices, projects, articles, resources, and learning journeys to help users select career paths and develop professional skills.
Linxicon is a daily word game in which players connect two random words by building a chain of words that bridges their meanings. It offers one word pair to connect per day, along with unlimited practice. The page says a new game starts on a timer.
Listudy is a free and open source chess training site that uses spaced repetition to help users memorize openings, train tactics, and practice endgames against Stockfish. It also offers blind tactics, where the board shows a position from several moves earlier, and pieceless tactics, where an empty board is accompanied by a list of piece locations. The source code is available on GitHub.
LittleLink is an open source, do-it-yourself alternative to Linktree for creating link-in-bio pages. It includes over 100 branded button options, supports light, dark, and automatic themes, and follows best practices for SEO, accessibility, and performance, with no required frameworks or JavaScript.
