Teaches PostgreSQL through browser-based exercises graded by a real Postgres engine.

A free local task and time-tracking tool that stays visible above other apps.

Runs portable WebAssembly apps on verifiable hosts and charges for compute used.

A Chrome extension that uses customizable AI recipes to summarize and organize web pages while you browse.

A free library of curated, model-tagged prompts for AI image, video, and audio creators.

Generates and modifies tattoo designs from ideas, with controls for style, placement, and detail.

A browser puzzle game where players contain spreading wildfires and protect houses using limited actions and tools.

A browser-based idle pirate RPG where players sail, battle, collect loot, and progress while the tab is open.

Provides AI-guided tarot readings and follow-up questions for people seeking reflection on personal situations.

Imposes PDFs for print layouts such as booklets, cards, posters, and gang sheets in the browser.

A tool for US employees to compare their compensation with their employer’s profits using public company data.

A Mac app that turns file moves into courier deliveries with an audit trail.

A flexible canvas for arranging, grouping, and exporting notes and documents.

Provides embeddable SVG sparklines and quote data for stocks, crypto, currencies, commodities, and indexes.

Lets AI agents review and rank the humans they work with.

A platform for browsing, evaluating, and building reusable prompts for AI tasks.

Builds and deploys AI agents with privacy guardrails for teams using code or a visual builder.

Provides agentic code reviews for pull requests through GitHub Actions, including public fork workflows.

Helps people with ADHD use calendar gaps for tasks and sends reminders before their next meeting.

Offers free browser games based on Bible stories and parables for players of all ages.

Creates editable short-form videos from text, PDFs, or ideas for social media creators.

A strategy game where players claim neighboring countries and compete against opponents.

Resolves Maven dependencies and packages their JARs into a ZIP for Java developers without Maven builds.

A browser puzzle game that teaches AVL trees and data structures by guiding squirrels through tree rotations.

A Pi extension that runs sequential coding-agent prompts over files, directory children, or lines in a file.

Lets developers and strategy players submit agent code, run deterministic battles, and review replays.

A curated dataset of sandboxes and alternatives for isolating AI coding agents.

Helps pinball owners diagnose machine faults using cited service manuals and repair documents.

Automatically responds to iOS and Android app refund requests and chargebacks with evidence of user activity.

A native macOS and Windows app for building, testing, and debugging REST and GraphQL APIs.

A daily chart game where players predict market moves and compete on paper-trading results.

Teaches developers to understand codebases through guided coding lessons without writing code for them.

An MIT-licensed Rust engine provides GNSS and astrodynamics capabilities through interfaces for six programming languages.

Helps researchers assess U.S. nonprofits using financial, governance, program, relationship, and public-web information.

Compares public holidays across countries to help teams plan meetings and coordinate work.

A searchable, citable repository that helps builders and researchers find unresolved problems to work on.

An interactive ranking compares S&P 500 companies’ CEO pay gaps and worker pay with profit using SEC filings.

Lets people customize a notepad with planning and note-taking frames, then have it printed and shipped.

A platform for assigning AI agents bounties on unsolved problems.

An open-source database agent that monitors, optimizes, and answers questions about Postgres and MySQL databases.

A browser game offering daily NumberLink, Masyu, pentomino, word, and number puzzles.

Challenges players to place countries into daily geography categories for points.

Offers daily logic puzzles and unlimited practice games for people who enjoy solving puzzles.

Provides a browser-based IDE, cloud workspaces, coding interviews, courses, and developer tools.

A daily picture-word puzzle game where players swipe words through a letter grid to reveal a hidden image.

A browser puzzle game where players flip levers to guide an orb from a gold tile to the goal.

A desktop app that detects and softens flashing content for people with photosensitive epilepsy or light sensitivity.

Lets players duel friends in fast word-dice matches, play a daily challenge, and climb the ranks.

Helps businesses use documents and connected apps to answer questions, research topics, and create work deliverables.

Extracts SQL query history into a portable semantic model for analytics teams.

Lets people gather and share memories of someone as a collaborative keepsake.

A cited archive of Apollo 11’s lunar-surface mission for readers exploring its history and science.

Measures how closely a website’s claims match evidence an AI agent can find.

A browser game that users can play online.

A web reader for Hacker News stories and comments with previews, search, and trend indicators.

A local-first clipboard manager for Mac, iPhone, and iPad with searchable history and private device sync.

Tracks daily price changes across the 500 most valuable Pokémon cards using TCGplayer market prices.

Helps people calculate their financial independence target and estimate when they can retire early.

Helps learners retain knowledge with interactive lessons, learning paths, and spaced-repetition flashcards.

A free typing game with daily challenges, personal bests, and leaderboards for players practicing typing speed.

Adds properties, filters, and review tools to Google Calendar for tracking work and life.

Lets users search video transcripts across platforms and jump to matching moments.

Sells affordable Next.js starter kits, boilerplates, and templates for indie developers.

Tests internet connection speeds in browsers and publishes country-level speed data.

A job board connecting defence industry employers with job seekers across Europe.

Helps domain investors find, score, and bid on Namecheap Marketplace auction domains.

An AI video editing service lets creators and teams edit footage on a real timeline, then publish to social platforms.

Encrypts direct messages inside existing chat apps using post-quantum encryption.

A directory that helps people discover and compare AI tools, agents, and apps.

Converts YAML files to JSON and JSON to YAML in the browser for people working with configuration files and manifests.

Creates customizable email signatures for individuals and teams to use in Gmail, Outlook, and Apple Mail.

Captures meeting notes and answers questions about your files on Meet and Zoom without a meeting bot.

Helps consumers compare negotiated hospital prices across hospitals in the Northeast.

A free desktop app for creating and organizing local Markdown notes on Mac, Windows, and Linux.

Generates professional headshots from casual photos for people updating LinkedIn profiles, resumes, and company directories.

A physics-based drone flight game for practicing mouse-and-keyboard flying, playing offline, and hosting multiplayer sessions.

An open-source React component system for building Korean, Japanese, and Chinese interfaces with vertical writing.

An interactive map for exploring cultural artifact provenance by place, time, and collection.

Creates shareable restaurant websites from menu photos for restaurants, cafés, and food trucks.

A Chrome extension that tracks homework pace and offers step-by-step help and study materials for students.

Provides developer APIs for retrieving structured live data from search, commerce, news, jobs, and social sites.

A macOS panel for managing clipboard history, snippets, shortcuts, files, and timers.

Provides browser-based tools for developers to encode data, inspect tokens, calculate hashes, and perform other tasks locally.

Generates and edits songs from text prompts or lyrics for creators and project makers.

Creates personalized study plans, quizzes, and spaced-repetition reviews from learners’ own materials.

Transcribes live conversations into large, readable captions on an iPhone without sending audio to the cloud.

A desktop assistant that edits files, searches the web, and runs connected tools from plain-language requests.

An interactive learning resource showing before-and-after examples of 21 UX design principles.

Answers customer and internal questions from spreadsheet data through an embeddable widget or API.