fizzy is an open-source framework in Zig for editors and polished apps, built around a near-empty host, a stable SDK and plugins. It runs natively on macOS, Linux and Windows and in the browser. Its plugins include a file tree, text editing, markdown preview, image viewing, zip archives and Google Drive; the project is pre-1.0.
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FlowerShow is a no-code platform that converts markdown files into hosted websites. It supports use cases including digital gardens, blogs, wikis, and documentation sites. Key features include backlink mapping, interactive knowledge graphs, automatically linked searchable wikis, sidebar navigation and full-text search for documentation, password protection, and comment functionality. The service natively supports CommonMark, GFM, Obsidian wikilinks, Mermaid diagrams, and LaTeX math, and is free to use with no credit card required.
fm is a terminal-based file manager written in Go. It provides file icons requiring a nerd font, syntax highlighting for source code with customizable themes, markdown rendering, mouse support, and themes including default, gruvbox and nord. It can open the selected file in the editor set in the EDITOR environment variable and copy selected directory items to the clipboard.
For the Badge creates custom SVG badges for projects. It offers a visual generator for badge design and a REST API that returns badges via query parameters. The project is open source, and badges can be exported as SVG or copied as markdown for use in READMEs.
Fusuma is a tool for creating slides from Markdown or MDX. It offers a zero-config setup and a command-line interface for development, building, exporting as PDF, deploying to GitHub Pages, presenter mode, and live mode. It can record slide timelines and voice for practice and supports drawing fluorescent marker lines during a speech. Fusuma requires Node 12.x or later.
GetMarkdown converts files such as PDF, Word, PowerPoint, Excel, HTML, images and audio to Markdown. Free conversions run locally in the browser with no account, supporting up to 8 files per batch at 10 MB each. An optional paid Pro tier performs server-side PDF processing for complex layouts and scanned PDFs.
ghostwriter is a free and open-source Markdown editor for Windows, Linux and macOS. It offers a distraction-free writing mode, light and dark themes, live HTML preview, and a sidebar outline for navigation. Focus Mode highlights the current text, and a Hemingway Mode disables backspace and delete keys. It can auto-detect Pandoc, MultiMarkdown or cmark processors for live preview and export.
Magic ToDo is a browser-based tool from Goblin Tools that breaks tasks into smaller steps. The page offers saving to and loading from a saved file, copying to the clipboard, printing, and exporting in several formats, including iCal tasks and events, Markdown, and Todoist. It also exports to Asana, Notion, Amazing Marvin and TickTick. A mobile app is mentioned.
gotoHuman is a platform for supervising AI agents, letting workflows request human review of critical steps. Reviewers approve and edit AI-generated content in an Agent Inbox, with email and Slack notifications, and completed reviews return to the workflow via webhook. Review types are configured in a no-code editor and can capture text, images, markdown and JSON.
GritQL is a declarative query language from Grit for searching and modifying source code. It lets users search with code snippets and metavariables, define custom lints, and apply auto-fix rules, and it supports rewriting JavaScript/TypeScript, Python, JSON, Java, Terraform, Solidity, CSS, Markdown, YAML, Rust, Go and SQL.
Gwern.net is the personal website of Gwern Branwen, a writer, self-experimenter and programmer. It is a categorized index of essays covering topics such as psychology, statistics, technology, deep learning and anime. The site is built as a static website compiled via Hakyll from Pandoc Markdown and hosted on a dedicated server, with features aimed at typography, speed and hypertext browsing.
HackMD is a real-time Markdown editor for collaborative work. It offers live editing with multiple cursors, comments and mentions, version history, templates, and GitHub integration. Comments support asynchronous discussion of note content without changing it.
HedgeDoc, formerly known as CodiMD, is an open-source, web-based, self-hosted collaborative markdown editor. Users share a note link to collaborate in real-time on notes, graphs and presentations. It is licensed under AGPL 3.0, and its source code is available on GitHub.
HelixNotes is a local markdown note-taking app that keeps notes as plain .md files in a folder on the user's disk. It offers a rich editor with a source mode, a tasks view collecting checklist items, and a graph built from wiki links. It is free and open source under AGPL-3.0, with no account, and runs on Linux, Windows, macOS, Android, iPhone and iPad.
Hexo is a blog framework powered by Node.js that generates static files from posts written in Markdown or other markup languages. It offers theming, plugins and one-command deployment to platforms such as GitHub Pages or Heroku.
Highlights is a PDF reader for research on Mac, iPad and iPhone. It can be used free to read and annotate PDFs, and turns annotations into notes that can be exported as Markdown, HTML, TextBundle, WebArchive and PDF files. It also offers citation lookup, text and table recognition, and Smart Copy.
HTML widgets are R packages that produce interactive web visualizations, working like R plots. A line or two of R code produces a D3 graphic or Leaflet map. Widgets run at the R console and can be embedded in R Markdown reports and Shiny web applications. The page lists widget examples including Leaflet, dygraphs, Plotly and Highcharter, and describes composing dashboards with flexdashboard and linking widgets with crosstalk. New widgets can be developed by bridging R and JavaScript.
IntoDNS.AI is a DNS and mail server checker that reports on SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, FCrDNS and blacklists. It also offers a free public REST API for DNS and email security scans, with JSON and Markdown reports. The service states it is not affiliated with intodns.com.
Jekyll is a static site generator that takes text written in a markup language and uses layouts to create a static website. It also builds blog-aware static sites from Markdown, Liquid, HTML and CSS, and supports free hosting with GitHub Pages.
Joplin is a free, open-source note-taking and to-do application that organises notes into notebooks. Notes are stored in Markdown and are searchable, taggable and editable, with offline-first access, end-to-end encryption, plugins and themes, and sync via services including Nextcloud, Dropbox, OneDrive and Joplin Cloud. Apps exist for Windows, Linux, macOS, Android and iOS, plus a Firefox and Chrome web clipper.
Jupyter Notebooks as Markdown Documents, Julia, Python or R scripts.
An R package that creates interactive Leaflet maps using the Leaflet JavaScript library and htmlwidgets. Maps can be used from the R console, RStudio, Shiny applications and R Markdown documents. It is linked to the open-source Leaflet JavaScript library for interactive maps.
LearnByExample is a blog covering Python, regular expressions, Linux, scripting, Vim and self-publishing, along with technical articles and book announcements. Posts include a Python regular expression cheatsheet, guides to sed substitution and awk, and tutorials on using pandoc to generate PDF and EPUB files from markdown.
Self-hosted bookmark manager designed to be minimal, fast, and easy to set up using Docker. It provides a clean interface, tag-based organization, Markdown notes, read-it-later functionality, and sharing with other users or guests. Bookmarks can be imported and exported in Netscape HTML format, and browser extensions exist for Firefox and Chrome.