A free interactive visualizer for 3D cell biology models.

Provides an interactive tool that allows users to rotate, zoom and inspect detailed 3D models of various biological cells in real time. It is specifically designed for students preparing for exams like the MCAT or studying AP Biology.

Learn SQL through engaging mystery games.

Offers interactive SQL puzzles and a mystery storyline to help users practice and learn SQL queries in an entertaining way by solving cases based on Agatha Christie's mysteries.

An interactive ocean observation simulator for binary star systems.

Solaris is an educational and research tool that simulates oceanic environments in orbit around planets with binary suns. Users can observe the effects of dual stellar influences on ocean morphology, activity levels, and MIMOID (marine intelligent microorganisms) behavior.

A tool for generating crossword puzzles to improve vocabulary and spelling skills.

Motplot is designed to help users create crossword puzzles by plotting letters in a grid. It can be used to generate custom word games that challenge the user's knowledge of words and their positions.

A Progressive Web App for guitar scales, circle of fifths and more.

This PWA provides users with interactive tools to learn and practice guitar scales, the circle of fifths, chord progressions, a tuner, and a listener. Users can explore different musical concepts like CAGED system patterns, scale notes on the fretboard, and intervals in major or minor keys.

Bitcoin's purchasing power visualized in physical terms.

The service converts the value of a single Bitcoin into tangible goods such as gold, silver, plutonium-238, and cocaine. It provides dimensions for how much of these items could be purchased with one Bitcoin based on their current market values.

Interactive historical atlas of the Crusader Kingdom of Jerusalem, 1099-1291.

Provides an interactive and hand-curated map detailing castles, churches, fortified towns, battles, lordships, and pilgrim roads across Israel and the wider Latin East during the Crusader era. It includes detailed information on historical sites and events within the Kingdom of Jerusalem and its neighboring states.

Interactive simulation platform for educational and exploratory purposes.

Simloops provides an interactive environment where users can engage with various simulations, such as mathematical games like Nim or fractal patterns like fBm (Fractional Brownian Motion), in a community-driven forum similar to Reddit.

Daily technical interview questions delivered directly to developers within the platform.

Provides curated backend and frontend technical questions to assist developers with interview preparation. It promotes structured learning through daily bite-sized questions and answers, encouraging users to reflect on their own solutions before reviewing the correct answers.

Learn a language through trivia.

Users can choose from several languages and answer 10 trivia questions in the chosen language. Hints are available during the quiz by tapping on any word within the question.

Daily micro-courses and a Socratic AI companion designed to build knowledge without destroying your attention span

Sophros generates micro-courses that break down complex topics into bite-sized, easy-to-read articles tailored to users' available time during work or school breaks. The platform creates learning plans based on specified time constraints (e.g., 3-minute daily sessions).

Interactive geographic knowledge test with region identification

Tests users' geographic knowledge by highlighting regions on a map and requiring name input. Features include pan/zoom functionality, score tracking, and region-specific progress indicators for continents and subregions.

Free browser simulator for modeling PE/VC fund lifecycles

Models the entire lifecycle of private equity and venture capital funds, simulating capital calls to carried interest. Features include waterfall distribution simulation, J-curve visualization, and calculation of fund performance metrics like DPI, TVPI, and IRR.

A Startup Stock Option Horror Roguelike

Provides strategic gameplay to simulate and learn about the manipulation of ESOPs in startups, offering scenarios based on real tactics.

A network of values-driven librarians focused on privacy, intellectual freedom and information democracy.

The Library Freedom Project provides library workers and their communities with skills and resources to address issues such as privacy, intellectual freedom, and information democracy. They offer workshops and training across the country and distribute educational materials for advocacy.

An app for learning irregular verbs in the German language

This app helps users memorize irregular German verbs, which do not follow clear rules and require focused study. It provides structured learning with a complete list of 191 irregular verbs (including 10 archaic ones), organized for clear and comfortable learning through flexible filtering, different sorting options, and logical structure. The app also includes built-in tests to reinforce learning.

A minimalistic visual tool for exploring chess openings.

This service provides a visual interface to explore and compare various chess opening strategies, focusing on popular moves like the e4 Scandinavian and d4 Queen's Gambit among others. Users can interact with the board to understand different variations of each opening.

Capital Punishment Geography Trivia Game

Capital Punishment is a geography trivia game based on the concept of remembering information about cities. Users engage in a quiz format to test their knowledge on different geographical locations.

Enhances transparency of Google Classroom for parents.

Provides a clear overview of all classes and assignments for students' Google Classrooms without requiring API access, allowing parents to easily track what's happening in their child's educational environment.

Website is a Video Game

PRESS START is a multi-product startup that offers a variety of services, including creating personalized bedtime stories for kids, document AI for better research and writing, and tools for brand positioning and democratic education.

Sanskrit shloka word-by-word meanings

Shloka Artha provides detailed word-by-word translations and explanations of Sanskrit shlokas, mantras, and stutis. Each entry includes the original text, transliteration, and meaning. It serves as a resource for understanding Hindu philosophical and spiritual texts.

Understand every term in any YouTube video

A free browser extension that scans the transcript of any YouTube video and provides instant explanations for technical and financial terms right alongside the video, with clickable timestamps back to specific points.

A teaching skill that guides you to discover answers through questioning

This skill turns your AI agent into a Socratic tutor, guiding you to find answers through a structured series of questions rather than directly providing solutions. It works with various knowledge assets like codebases, documents, and diagrams to aid in learning and understanding.

AI-powered simple explanation generator with trusted sources

Provides easy-to-understand explanations of complex topics at adjustable complexity levels. Searches real sources and generates citations for each explanation.

First-principles learning platform for deep subject understanding

Uses AI to help users learn complex subjects by finding foundational texts and distilling them into simple, understandable concepts. Allows users to input specific learning interests or explore predefined topics.

Interactive learning platform for complex concepts through AI-generated visualizations

Vectree helps users understand complex concepts by generating interactive SVG visualizations. It allows learners to explore topics across multiple disciplines through visual, conceptual pathways.

Interactive language learning through crossword puzzles with spaced repetition

Cranki combines crossword puzzles with spaced repetition learning technique. Users can create custom word lists or import existing word sets to learn languages through interactive puzzles.

A database documenting historical atrocities.

This database collects and catalogs various historical atrocities, providing users with detailed information about these events. It serves as a resource for researchers and educators interested in human history and social justice.

Competitive math platform with ELO-based ranking.

Locus is a competitive math platform that allows users to engage in math challenges and receive instant feedback. It features an ELO-based ranking system to track performance across various mathematical topics such as Algebra and Calculus.

Listen to any text as audio.

Raconter allows users to listen to any file or text snippet as audio. It uses offline natural speech generation powered by machine learning models, enabling users to enjoy text-to-speech functionality without a subscription.

A dungeon crawler game for the TI-89 graphing calculator.

This service provides a height-mapped raycasting engine and dungeon crawling experience on the TI-89 graphing calculator. It features textured walls, procedurally generated dungeons, and innovative combat mechanics.

Country Budget Allocation Simulator using AI predictions.

EconoSIM allows users to govern a simulated country by allocating budgets across various categories. It uses a machine learning model to predict the long-term societal impacts of these budgetary decisions based on real OECD data.

Learn SQL and Python with visual execution tools

Qatabase teaches SQL, Python, algorithms, and data science through visual execution, allowing users to watch queries trace through data and see code run line by line. This hands-on approach aims to build a deeper understanding of coding beyond just output results.

AI-powered AWS exam preparation tool

Knowza.ai offers exam-format practice questions for AWS certifications, leveraging AI to provide instant explanations and feedback. It helps users track their progress and identify areas for improvement through detailed analytics.