No moat. Still in business.

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Web app for teams to plan work into milestones, track tasks on a kanban board and log time against them.

Since 2014

Projects and tasks

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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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Runs automated tests against your APIs and websites after each deploy and on a schedule, with alerts on failure.

Since 2016

Uptime and monitoring · Developers

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Daily notes app that puts project notes, tasks, Apple Calendar events and Reminders side by side for planning each day.

Since 2020

Subscription · Notes and knowledge · Individuals and families

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Desktop app for designing, calling and documenting APIs that keeps an OpenAPI spec in sync, offline with no login.

Since 2024

Free trial · Developer tools · Developers

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Track and compare spending across projects by dragging budget items around Kanban boards that total themselves.

Since 2024

Subscription · Money and budgeting

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Free to-do app with timers, a Pomodoro mode and day planning that keeps your data on your own device.

Free · Time tracking · Individuals and families

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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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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 sales pipeline and lead tracker that reads and writes a Google Sheet, made for solo founders and tiny teams.

Since 2026

Free · CRM and sales · Freelancers

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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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Issue tracking and project planning for software teams, with boards, sprints, roadmaps and AI agent handoffs.

Since 2016

Free plan · Projects and tasks · Developers

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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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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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A shared workspace where people and small teams write linked notes and docs, keep tasks, and ask an AI assistant.

Since 2024

Free plan · Projects and tasks

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Plans sprints for software teams with task boards, a roadmap, a backlog, retros, whiteboards and progress charts in one tool.

Free plan · Projects and tasks · Software companies

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Shared space where teams write docs and move the same pages across boards to track project status.

Free plan · Projects and tasks

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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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Project management for teams, with task boards, timelines, timesheets and workload views at a flat price per user.

Subscription · Projects and tasks

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Flexible board based work management tool where teams build their own views, fields and automations for projects.

Projects and tasks

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Project board that shows every project as a column, with notes, Gantt charts and AI agent helpers for teams.

Since 2024

Free plan · Projects and tasks

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Project tool with task lists, kanban boards, subtasks and Gantt charts that teams can use for free.

Free plan · Projects and tasks

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An open-source kanban board you install yourself for tracking tasks across boards, lists and cards.

Free · Projects and tasks

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

Since 2024

Courses and learning · Individuals and families

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Open-source task and project manager with list, Kanban, Gantt and table views that you can self-host or run in its EU cloud.

Projects and tasks

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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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Kanban boards, sprints, backlogs and roadmaps for software teams that work in an agile way.

Free plan · Projects and tasks · Developers

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Visual project boards where teams assign and track tasks, keep shared documents and report on progress, hosted in Germany.

Free plan · Projects and tasks

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Kanban boards for people and teams, with Pomodoro or stopwatch time logging and flow charts for spotting bottlenecks.

Free plan · Projects and tasks

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

Since 2024

Free plan · Courses and learning · Individuals and families

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Realtime kanban boards for planning projects and splitting work into tasks, available hosted or to run yourself.

Subscription · Projects and tasks

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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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A task manager that lays out your whole week on a timeline, works offline, and can be self-hosted.

Free · Projects and tasks · Individuals and families

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Self-hosted notes and checklists app that keeps everything as Markdown files on your server, with kanban boards.

Free · Notes and knowledge · 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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A Mac app for writing and linking plain Markdown notes in your own folders, with boards, tables and optional AI help.

Since 2026

Free plan · Notes and knowledge · Individuals and families

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A language app that translates words offline, saves them to your own tagged word list and helps you review them with flashcards.

Since 2025

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.

Since 2025

Free plan · Courses and learning · Individuals and families

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Builds a command line tool for your API from its docs, with binaries, install scripts and updates, so AI agents can use it.

Since 2026

Developer tools · Developers

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Spin up hosted mock servers from OpenAPI, SOAP, GraphQL or gRPC specs so teams can test without the real backend.

Since 2025

Free plan · Developer tools · Developers

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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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Kanban boards to organise team tasks, hosted or self-hosted, with Trello import and templates.

Since 2025

Free plan · Projects and tasks

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

Since 2026

Subscription · Courses and learning · Individuals and families

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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