No moat. Still in business.

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Make your own flashcard decks and review them on a spaced repetition schedule in the browser.

Since 2015

Free plan · Courses and learning · Individuals and families

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Desktop data analysis app where you ask about your data in plain English and get Python code, charts and notebooks run on your computer.

Since 2017

Data and spreadsheets

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Sends your notes from books, podcasts and articles back by email or Telegram on a spaced repetition schedule so you remember them.

Since 2024

One-off payment · Notes and knowledge · Individuals and families

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A self-hosted PHP blog engine for writers who want to run their own blog, extended with plugins and themes.

Free · Website builders · Individuals and families

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Mac app that runs Nginx, PHP, MySQL, PostgreSQL and Redis locally for web developers without Docker or VMs.

Since 2022

Free plan · Developer tools · Developers

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An open-source photo and video library you run on your own server, with animated previews, search and browser playback.

Since 2024

Free · Video and audio · Individuals and families

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Log every flight you take on your own server, see routes on a world map and get travel stats.

Free · Travel · Individuals and families

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A simple to-do list app you host yourself, with several lists, tags, due dates and priorities.

Free · Projects and tasks · Individuals and families

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Self hosted tool for people who want their European bank transactions copied into Airtable, Google Sheets, Notion, Actual Budget or CSV.

Since 2026

One-off payment · Automation and integrations · Individuals and families

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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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French open source e-commerce platform for building custom online stores, with click and collect and ERP or CRM connections.

Free · Online shops · Shops and retail

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Open source document management system you host yourself to store files and run review workflows.

Free · Documents and e-signature

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Drills you on keyboard shortcuts for editors and work apps with spaced repetition until they become habit.

Since 2012

Free plan · Courses and learning · Individuals and families

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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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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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Note app for students that builds flashcards, quizzes and summaries from notes and PDFs with spaced repetition.

Since 2021

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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A Docker app with a web interface for setting up Nginx reverse proxies and auto-renewing SSL certificates.

Free · Developer tools · Individuals and families

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A study app for students with spaced repetition flashcards, made from notes and PDFs, and scheduled around your calendar.

Free plan · Courses and learning · Individuals and families

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A self-hosted content management system built on Laravel that developers and studios use to build client websites.

Subscription · Website builders · Agencies

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Lightweight blog software in plain PHP that stores posts as files, with themes, plugins and comment spam protection.

Free · Website builders · Individuals and families

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A small PHP blog engine you install on ordinary web hosting, with themes and an easy admin panel.

Free · Website builders · Individuals and families

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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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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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Flashcard app for iPad and iPhone where students draw, type or add images to cards and review them with spaced repetition.

Since 2024

Courses and learning · Individuals and families

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Tool for running a home server that installs and updates hundreds of self-hosted apps from a dashboard.

Free · Developer tools · Individuals and families

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Push a Docker image and get a public HTTPS link, so developers can share demos, bots and side projects quickly.

Free plan · Developer tools · Developers

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Flashcard app that uses spaced repetition so learners review hard cards more often, with sync between devices.

Courses and learning · Individuals and families

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Spreadsheet that links to databases and files and lets AI write the formulas, Python and charts for you.

Since 2023

Data and spreadsheets

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A light Mac app that runs Docker containers, Kubernetes and Linux machines as a Docker Desktop replacement.

Since 2023

Developer tools · 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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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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Simple private diary with one page per day, photo uploads and export, free to use or run on your own server.

Since 2026

Free · Notes and knowledge · Individuals and families

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Turns PDFs and notes into flashcards you can review and edit, then export to Anki, Mochi or SuperMemo.

Since 2026

Subscription · Courses and learning · Individuals and families

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Connect a Git repo and every push gets built and served as a live app with its own HTTPS address, for developers.

Free plan · Developer tools · Developers

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Upload a textbook and get chapter problems, feedback on your written answers and spaced recall reviews, for self-learners.

Since 2026

Free plan · Courses and learning · Individuals and families

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Paste a YouTube link or upload a transcript and get an Anki flashcard deck made by AI, ready to import.

Since 2025

Free plan · Courses and learning · Individuals and families

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Records every AI agent decision in a signed, tamper-evident log so teams can show regulators what their AI did under the EU AI Act.

Since 2026

Free plan · Developer tools · Developers

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Dashboard for setting up and managing WordPress servers on cloud providers, aimed at agencies and developers.

Free plan · Website builders · Agencies

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An iPhone app that builds a short-lesson course on any subject you choose, with reviews, streaks and an AI tutor.

Since 2026

Courses and learning · Individuals and families

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Students upload slides or notes and get practice quizzes and spaced-repetition flashcards made from them.

Since 2025

Free plan · Courses and learning · Individuals and families

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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 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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Lightweight open source PHP content management system with tag-based templates and plugins for running a website or blog.

Free · Website builders

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Connect Claude or ChatGPT so they turn what you read into flashcards, then review them on any device.

Since 2026

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

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Reads your Anki flashcards aloud through headphones and grades your spoken answers, with an AI tutor for follow-up questions.

Since 2026

Free plan · Courses and learning · Individuals and families

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Piano practice app that listens over MIDI as you play sheet music and schedules bar by bar memory reviews so pieces stick.

Since 2026

Subscription · Courses and learning · Individuals and families

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Point any domain at any URL with automatic HTTPS, path rules and hit analytics, no server to run.

Free plan · Website builders