No moat. Still in business.

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An iPhone app that takes Japanese learners from beginner to fluent with one new sentence per flashcard and spaced review.

Since 2015

Courses and learning · Individuals and families

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Desktop and web client for querying and editing SQL and NoSQL databases such as PostgreSQL, MySQL and MongoDB.

Since 2021

Free · Developer tools · Developers

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Video player for language learners that shows two subtitle tracks at once, generates subtitles and translates them live.

Free · Video and audio · Individuals and families

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A desktop and web app that finds resources across AWS, GCP, Azure and other clouds and lets infra teams work on them in one place.

Since 2026

Free plan · Uptime and monitoring · Developers

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Fixes the mixed content and insecure content warnings a WordPress site shows after it moves to HTTPS.

Website builders

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Gets and renews free Let's Encrypt SSL certificates on cPanel shared hosting without command line work.

Free plan · Security and passwords

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A Mac and Windows app that loads CSV, Excel and JSON files as tables so you can query, edit and chart them with SQL.

Since 2024

Data and spreadsheets

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A browser extension that saves and highlights words you look up on web pages, then drills them with flashcards.

Since 2020

Free plan · Courses and learning · Individuals and families

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Flash card app for learners to keep their own word lists and practise them with spaced repetition on Apple devices.

Courses and learning · Individuals and families

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Desktop database manager for browsing tables and writing SQL across Postgres, MySQL, SQLite, ClickHouse and more.

Since 2024

Free plan · Developer tools · Developers

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A Mac database client for querying and editing data, with SQL and Python notebooks and an AI assistant that writes queries.

Since 2023

Free plan · Developer tools · Developers

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Listening drills that help language learners catch spoken numbers, phone numbers and clock times in over two dozen languages.

Courses and learning · Individuals and families

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Helps intermediate language learners reach fluency through spoken chats with an AI tutor, corrections and daily articles.

Courses and learning · Individuals and families

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Mobile app where learners practise speaking a new language with AI characters and get pronunciation scores.

Since 2024

Courses and learning · Individuals and families

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Ad-free app that teaches children aged 3 to 14 one of 19 languages through listening, speaking and reading along.

Since 2024

Free plan · Courses and learning · Individuals and families

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Browser extension that swaps sentences on the pages you read into the language you are learning, scaled to your level.

Since 2024

Subscription · Courses and learning · Individuals and families

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A browser database editor you deploy next to your databases so a team can query Postgres, MySQL, MongoDB and more.

Free · Developer tools · Developers

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A desktop app to connect to 30+ databases, write or generate queries with your own AI keys, edit data and build dashboards.

Since 2026

Free trial · Developer tools · Developers

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Short Spanish stories pitched at the words an A2 to B1 learner already knows, with unknown words brought back for review.

Since 2026

Free plan · Courses and learning · Individuals and families

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Learn Japanese or Korean by tapping words in YouTube videos, manga and books, with flashcards that track what you know.

Free plan · Courses and learning · Individuals and families

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Learn the 2,136 jouyou kanji by grade, with stroke order, components, readings and example words.

Since 2026

Courses and learning · Individuals and families

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Learn to read Arabic with alphabet lessons, graded stories and flashcards that schedule reviews around your memory.

Since 2026

Free plan · Courses and learning · Individuals and families

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A local desktop editor for writing language courses with lessons and self-marking exercises, plus a free app to study them.

Since 2026

Free · Courses and learning · Creators and writers

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A browser extension for Chinese learners that puts words from your level into English pages, with readings and meanings on hover.

Since 2026

Courses and learning · Individuals and families

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Browser tool for software teams to resolve git merge conflicts, run a merge queue and manage CODEOWNERS rules.

Free plan · Developer tools · Developers

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Graded Japanese stories at your JLPT level, with tap-to-define words, grammar notes, audio and flashcards.

Subscription · Courses and learning · Individuals and families

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Phone app for learning a language by listening to native podcasts with synced transcripts and tap-to-translate words.

Since 2025

Subscription · Courses and learning · Individuals and families

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A native database client for querying and editing many SQL and NoSQL databases on desktop and iPhone.

Developer tools · Developers

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Mac app that pauses your shows and podcasts after each sentence to explain the translation, words and grammar.

Since 2026

Free plan · Courses and learning · Individuals and families

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Flashcard maker that schedules reviews by spaced repetition, with dictionaries and text to speech for language learners.

Free plan · Courses and learning · Individuals and families

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Stores the reasoning from AI coding chats with each git commit and posts it to pull requests for team review.

Free plan · Developer tools · Developers

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A Mac app that runs several AI coding agents side by side in separate clones and chains them to plan, build, review and test.

Free · Developer tools · Developers

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A Chrome extension that translates X and Reddit posts and quizzes you on new words, for people learning English.

Since 2026

Subscription · Courses and learning · Individuals and families

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An app for practising spoken conversations in 10 languages with an AI partner, then chatting with native speakers with translation.

Since 2026

Free plan · Courses and learning · Individuals and families

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A Mac app for browsing Postgres databases that turns plain-English questions into SQL and checks the SQL before you run it.

Since 2026

Free · Developer tools · Developers

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A reading app for language learners that imports books, articles and videos, translates words and sends vocabulary to Anki.

Since 2026

Free · Courses and learning · Individuals and families

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Language learners listen to free public domain audiobooks while following highlighted text and optional translations.

Free · Courses and learning · Individuals and families

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A language app where a partner or friend fills in words, audio and sentences for you to study, on iPhone and Android.

Courses and learning · Individuals and families

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Mac, iPad and iPhone app to query, browse and edit data in Postgres, MySQL, SQL Server, Redis, MongoDB and other databases.

Free plan · Developer tools · Developers

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Language learning app where you add the words you need and it builds practice sessions around them, in 20+ languages.

Since 2025

Free · Courses and learning · Individuals and families

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Practise a new language by chatting with AI, tapping words to save them and reviewing them later with spaced repetition.

Free plan · Courses and learning · Individuals and families

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Teaches English, Spanish, French and other languages through song lyrics, with spaced repetition for new words.

Courses and learning · Individuals and families

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Save new words from what you read or watch, get AI definitions and examples, then review them with FSRS flashcards on Apple devices.

Free plan · Courses and learning · Individuals and families

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A native app to connect to and query MySQL, Postgres, SQL Server, Oracle and other databases on desktop or phone.

Developer tools · Developers

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AI language teacher that runs group or private lessons with homework and practice talks in nine languages, for learners.

Free plan · Courses and learning · Individuals and families

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An app for learning Japanese with an AI tutor, speaking roleplays, kanji, quizzes and a personal study plan.

Since 2026

Free plan · Courses and learning · Individuals and families

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Desktop app for developers to query, browse, edit and chart data across Postgres, MySQL, MongoDB and other databases.

Since 2025

Free plan · Developer tools · Developers

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Makes subtitles for your video and audio files so language learners can look up words and send them to Anki.

Since 2026

One-off payment · Courses and learning · Individuals and families