Categories
A library of educational simulation games where players learn by building and compete on leaderboards.
Teaches VHDL and SystemVerilog through browser-based lessons, simulations, waveforms, and coding challenges.
An interactive timeline for exploring the history of the universe, life on Earth, and human civilization.
Helps adults learning French improve spelling and grammar through audio dictations with instant corrections.
A browser-based visual editor for building power networks and running pandapower load-flow calculations, aimed at students and beginners.
An interactive map and directory of astronomical observatories with details on history, telescopes, and sky darkness.
Helps developers practice data structures and algorithms for coding interviews with explained problems and AI mock interviews.
A free Bible reading app that presents Scripture as a scrollable feed with commentary and cross-references.
A macOS app that explains literary references, vocabulary, and context as people read.
Helps readers finish books by breaking reading into small daily sessions and suggesting what to read next.
Teaches robotics and ROS2 through interactive courses and a browser-based workspace for learners and makers.
Helps learners create personalized, interactive AI lessons with mental maps, examples, and quizzes.
An iOS flashcard app that helps students create cards, plan exam study, and review with spaced repetition.
Helps intermediate and advanced Italian learners practice speaking through voice conversations and personalized corrections.
Checks IELTS Task 2 essays and General Training Task 1 letters, estimates band scores, and identifies a key improvement for test takers.
Shares the history and art of Southern California citrus crate labels and sells canvas prints of vintage labels.
An interactive guide helps people learn Texas Hold'em rules, hand rankings, and poker strategy through practice.
A browser-based chess learning platform where players improve by facing ranked rivals, solving puzzles, and studying guides.
An adaptive Chinese-learning app with modeled flashcards, an offline dictionary, and an AI tutor.
A visual tool for exploring scientific papers through hypothesis structures, statistical tests, and variable relationships.
Helps young children practice identifying chords through color-based listening trails and saved family profiles.
Visualizes time and frequency domain vector samples with interactive shifts and animation for exploring signal processing.
Interactive programming courses teach learners to build real systems and verify them with graded tests.
Simulates double pendulums and lets users explore their parameter space.
Provides browser-based engineering calculators and diagram tools for students studying statics and mechanics.
A quiz game that asks players to match typefaces to the countries whose design systems use them.
Helps children learn letter sounds and reading through adaptive study sessions and a parent-facing curriculum report.
Provides interactive practice lessons on Claude Code and AI workflows, including planning, verification, and safe delegation.
An interactive textbook teaches learners to build and train robot policies using simulations and runnable code.
Guides learners through interactive, step-by-step missions to build real projects and workflows.
Curates engineering blog posts into daily readouts for developers seeking practical technical lessons.
A voice-based coach that helps people rehearse sales calls, interviews, pitches, and other high-stakes conversations.
Checks essays and other text against the live public web to help students and teachers find matching sources.
An AI learning agent creates personalized courses, summaries, roleplays, and quizzes for students and teams.
An interactive learning experience that teaches people how AI agents work through scripted, scrubbable demonstrations.
A family reading app that helps parents rotate bedtime books, discover stories, and track reading goals.
Lets companies create interactive serious games for onboarding, training, and internal communication.
Lets users find scientific papers by DOI or URL and rate and comment on them.
An interactive 2D semiconductor device simulator for exploring materials, doping, voltage, and current.
Helps organizations create, issue, email, and verify digital certificates in bulk.
A platform for exploring mathematical questions, discussions, and structured knowledge.
Teaches beginners practical subjects through plain-language lessons, quizzes, and interactive exercises.
Creates printable conversion and measurement charts for kitchens, workshops, classrooms, and everyday use.
Provides adaptive AI mock interviews and feedback for people preparing for job interviews.
Helps teens and adults practice reading social cues and responding to them through short interactive exercises.
Turns new arXiv papers into layered summaries that readers can read or listen to for free.
A game where players adjust neural network weights and biases to match a target curve.
Provides an Instagram-style feed of bite-sized data structures and algorithms content for interview preparation.
A book for experienced programmers teaching functional programming mental models through practical examples.
An archive preserving World War II eyewitness stories remembered by their families.
Checks essays and academic drafts for AI-like writing and highlights sentences for review.
A mobile app that annotates book pages and helps language learners study vocabulary with flashcards.
A learning platform that teaches programming through subject-based tracks, beginner foundations, and practice projects.
An interactive visual compares household, food, and AI water use using public data.
Teaches retro-game decompilation through interactive lessons graded against original compilers.
A daily vocabulary game that helps players practice word meanings through timed puzzles and endless practice.
Lets people answer World Values Survey questions and compare their values with countries.
A free browser-based tool that helps musicians practise reading notes on the grand staff against a timer.
A desktop app that teaches programming through interactive courses and code exercises on macOS, Windows, and Linux.
Helps English learners save phrases from videos and review them until they remember them.
Helps Japanese learners study grammar and kanji, practice speaking and roleplay, and follow personalized plans.
A scripture reading and search site for finding Bible passages by theme.
Teaches adults real-world slang and playful expressions in Spanish, French, and Portuguese through lessons and quizzes.
Explains what patents cover in plain English for inventors, founders, engineers, and curious readers.
Helps aspiring pilots compare flight schools by location, costs, aircraft, staff credentials, and quality scores.
A visual mini-course that teaches transformer concepts from the ground up.
A daily email puzzle that uses six clues to reveal the history of an English word.
A product decision methodology with open guides and AI skills for product managers and teams.
A spaced-repetition trainer for learning performance and cost estimates used in systems thinking.
An interactive web app for visualizing linear programming constraints, objectives, and solver methods.
Looks up computer scientists' publications and ranks venues using CORE rankings.
Helps candidates practice AI engineering interviews with code comprehension, RAG, agent, MCP, and system design problems.
Helps teachers create, conduct, and grade digital exams for their students.
Creates personalized learning paths and teaches topics through AI-guided conversations, visuals, and coding workspaces.
An interactive library that explains AI research papers with clear explanations, step-by-step math, and figures readers can explore.
An iPad app that helps children in grades K - 5 learn and practice spelling with spaced repetition and spelling tests.
An interactive learning platform teaches math, physics, and engineering through a sci-fi space academy for students.
Provides browser-based Python, Pandas, and Git exercises with an AI tutor for learners.
A tutorial guides students, data scientists, and hydrologists through building a reproducible Mississippi River discharge forecasting pipeline.
Mobile apps teach personal finance, AI, and everyday knowledge through short daily lessons.
An interactive course teaches table-tennis spin through lessons, experiments, and knowledge checks.
Teaches SQL through murder mystery cases where learners query databases to examine clues and identify the killer.
Provides spoken AI language tutoring with live corrections and memory of past sessions.
Provides astronomy news feeds, sky conditions, ISS pass predictions, and tools for logging observations.
