Dendron is an open-source, local-first, markdown-based, note-taking tool. It's a personal knowledge management solution (PKM) built specifically for developers and integrates natively with IDEs like VS Code and VSCodium.
 
Most PKM tools help you create notes but slam into a wall retrieving them once your knowledge base reaches a certain size threshold. That threshold varies with the tool, but virtually everything stops working past 10k notes unless the user was extremely diligent about organizing their knowledge. Past this threshold, entropy wins and every query becomes a keyword search and scrolling through pages of results. 
 
Dendron's mission is to help humans organize, find, and work with any amount of knowledge. It not only helps you create notes but also retrieve them retrieval works as well with ten notes as it does with ten thousand.

Dendron is an open-source, local-first, markdown-based, note-taking tool. It's a personal knowledge management solution (PKM) built specifically for developers and integrates natively with IDEs like VS Code and VSCodium.

Dendron - The personal knowledge management (PKM) tool that grows as you do!

WriteFreely is a clean, minimalist publishing platform made for writers. Start a blog, share knowledge within your organization, or build a community around the shared act of writing. Built on a plain, auto-saving editor, WriteFreely gives you a distraction-free writing environment. You can host your own community of writers. Interact with the decentralized social web via ActivityPub.
Start writing together, publicly or privately. Connect with other communities, whether running WriteFreely, Plume, or other ActivityPub-powered software. And bring members on board from your existing platforms, thanks to our OAuth 2.0 support. Intuitive organization
Categorize articles with hashtags, and create static pages from normal posts by pinning them to your blog. Create draft posts and publish to multiple blogs from one account.
Blog elements are localized in 20+ languages, and WriteFreely includes first-class support for non-Latin and right-to-left (RTL) script languages. Private by default
WriteFreely collects minimal data, and never publicizes more than a writer consents to. Writers can seamlessly create multiple blogs from a single account for different pen names or purposes without publicly revealing their association.

 WriteFreely is a clean, minimalist publishing platform made for writers. Start a blog, share knowledge within your organization, or build a community around the shared act of writing. Built on a plain, auto-saving editor, WriteFreely gives you a distraction-free writing environment. You can host your own community of writers. Interact with the decentralized social web via ActivityPub.

Write Freely - A clean, Markdown-based publishing platform made for writers

Blackfriday is a Markdown processor implemented in Go. It is paranoid about its input (so you can safely feed it user-supplied data), it is fast, it supports common extensions (tables, smart punctuation substitutions, etc.), and it is safe for all utf-8 (unicode) input.HTML output is currently supported, along with Smartypants extensions.

Blackfriday - A markdown processor for Go

Marker is a markdown editor for linux made with GTK+-3.0. It provides support to view and edit markdown documents. It supports TeX math rendering with KaTeX or MathJax. It also supports Mermaid diagrams, Charter for plotting, Syntax highlighting for code blocks with highlight.js, Integrated sketch editor, Flexible export options to PDF, RTF, ODT, DOCX.




Marker - Markdown editor for linux made with GTK+-3.0



QOwnNotes is the open source notepad with markdown support and todo list manager that works together with the default notes application of ownCloud and Nextcloud. You are able to write down your thoughts with QOwnNotes and edit or search for them later from your mobile device, like with CloudNotes or the ownCloud / Nextcloud web-service.
 
The notes are stored as plain text markdown files and are synced with Nextcloud's/ownCloud's file sync functionality. Of course other software, like Syncthing or Dropbox can be used too.

QOwnNotes is the open source notepad with markdown support and todo list manager that works together with the default notes application of ownCloud and Nextcloud. You are able to write down your thoughts with QOwnNotes and edit or search for them later from your mobile device, like with CloudNotes or the ownCloud / Nextcloud web-service.

QOwnNotes - Plain-text file notepad and todo-list manager with markdown support and ownCloud / Nextcloud integration

Logseq is a platform for knowledge management and collaboration. It focuses on privacy, longevity, and user control. The server will never store or analyze your private notes. It works on top of local plain-text Markdown and Org-mode files. Use it to write, organize and share your thoughts, keep your to-do list, and build your own digital garden. It provides support to organize your tasks and projects with built-in workflow commands. 

Logseq - Platform for knowledge management and collaboration.

Tina is an open-source site editing toolkit for React-based frameworks (Gatsby & Next.js). Manage content on your own site, not another platform. Import Tina directly into your components to expose an editing interface for controlling and updating layers of your content mesh. You define the content model and editing powers specific to your site.
 
Retain the benefits of a Git workflow for your content and empower all teammates to update your website through a user-friendly interface. Add an editing interface to your React components and give your content team the power to build complex pages.

Tina is an open-source site editing toolkit for React-based frameworks (Gatsby & Next.js). Manage content on your own site, not another platform. Import Tina directly into your components to expose an editing interface for controlling and updating layers of your content mesh. You define the content model and editing powers specific to your site.

Tina - Site editing toolkit for modern React-based sites (Gatsby and Next.js)

react-markdown is a Markdown component for React using remark. There are other ways for markdown in React out there so why use this one? The two main reasons are that they often rely on dangerouslySetInnerHTML or have bugs with how they handle markdown. react-markdown uses a syntax tree to build the virtual dom which allows for updating only the changing DOM instead of completely overwriting. react-markdown is 100% CommonMark (optionally GFM) compliant and has extensions to support custom syntax.

react-markdown -  Markdown component for React 

Hallo is a very simple in-place rich text editor for web pages. It uses jQuery UI and the HTML5 contentEditable functionality to edit web content.The widget has been written as a simple and liberally licensed editor. It doesn't aim to replace popular editors like Aloha, but instead to provide a simpler and more reusable option.

Hallo - Simple rich text editor (contentEditable) for jQuery UI

HTMLy is an open source Databaseless Blogging Platform or Flat-File Blog prioritizes simplicity and speed written in PHP. HTMLy can be referred to as Flat-File CMS either since it will also manage your content. HTMLy uses a unique algorithm to find or list any content based on date, type, category, tag, or author, and it's performance remain fast even if we have ten thousand of blog posts and hundreds of tags.
As a flat-file CMS, With 512MB of RAM or even less, it should can handle more than 20K posts without any issues.
Features:
<ul dir="auto">
<li>Admin Panel</li>
<li>Markdown editor with live preview and image upload</li>
<li>Categorization with category and tags (multiple tagging support)</li>
<li>Static Pages (e.g. Contact Page, About Page)</li>
<li>Meta canonical, description, and rich snippets for SEO</li>
<li>Pagination</li>
<li>Author Page</li>
<li>Multi author support</li>
<li>Social Links</li>
<li>Disqus Comments (optional)</li>
<li>Facebook Comments (optional)</li>
<li>Google Analytics</li>
<li>Built-in Search</li>
<li>Related Posts</li>
<li>Per Post Navigation (previous and next post)</li>
<li>Body class for easy theming</li>
<li>Breadcrumb</li>
<li>Archive page (by year, year-month, or year-month-day)</li>
<li>JSON API</li>
<li>OPML</li>
<li>RSS Feed</li>
<li>RSS 2.0 Importer (basic)</li>
<li>Sitemap.xml</li>
<li>Archive and Tag Cloud Widget</li>
<li>SEO Friendly URLs</li>
<li>Teaser thumbnail for images and Youtube videos</li>
<li>Responsive Design</li>
<li>User Roles</li>
<li>Online Backup</li>
<li>File Caching</li>
<li>Online Update</li>
<li>Post Draft</li>
<li>i18n</li>
<li>Menu builder</li>
</ul>

HTMLy is an open source Databaseless Blogging Platform or Flat-File Blog prioritizes simplicity and speed written in PHP. HTMLy can be referred to as Flat-File CMS either since it will also manage your content.

HTMLy  - Simple and fast databaseless PHP blogging platform, and Flat-File CMS 

Standard Notes is the 100 year notes app. It's built long-lasting so you never have to find another one. It syncs on all your devices. It encrypts your data to protect your privacy. And it backs up your notes so you never lose anything again. 
 
Standard Notes comprises of two main technologies that work together to ensure a private, secure experience. One is the core stack of Standard Notes client applications. On the other end is a simple framework called Standard File used for encrypting data locally and syncing it to the cloud.

Standard Notes is the 100 year notes app. It's built long-lasting so you never have to find another one. It syncs on all your devices. It encrypts your data to protect your privacy. And it backs up your notes so you never lose anything again. 

Standard Notes - Your notes for good

Today CommonMark is the de-facto Markdown standard. And GFM (GitHub Flavored Markdown) is another popular specification based on CommonMark maintained by GitHub which is known as the biggest Markdown user. ToastUI Editor respects CommonMark and GFM specifications. Write documents with easy and productive tools provided by ToastUI Editor. You can open this document wherever the specifications are supported.
 
ToastUI Editor provides Markdown mode and Wysiwyg mode. Someone may like the productivity of Markdown, but the other can be looking for a way to make it easier to edit. The ToastUI Editor can be the coordinator of both. It offers Markdown mode and Wysiwyg mode, those can be switched at any time during writing content. Work together conveniently in one document.

Today CommonMark is the de-facto Markdown standard. And GFM (GitHub Flavored Markdown) is another popular specification based on CommonMark maintained by GitHub which is known as the biggest Markdown user. ToastUI Editor respects CommonMark and GFM specifications. Write documents with easy and productive tools provided by ToastUI Editor. You can open this document wherever the specifications are supported.

Toast UI Editor - Markdown Wysiwyg Editor

Symphony is a modern community platform. It implements a content oriented discussion forum. It includes a social network for users to share, make friends, and play games. It has the ability to aggregate independent bloggers, to build and share quality resources. 

Symphony - A modern community (forum/BBS/SNS/blog) platform written in Java

CODEDOC is an open-source tool that helps you with creating beautiful and modern software documentation. It creates a JAMStack app from your markdown files that you can easily deploy on services such as GitHub Pages.

CODEDOC - Creates beautiful and modern software documentation

Mark Text is a Next generation markdown editor. A simple and elegant open-source markdown editor that focused on speed and usability. Mark Text uses virtual DOM to render pages which has the added benefits of being highly efficient and being open source. That way anyone who loves markdown and writing can use Mark Text.


Mark Text - A simple and elegant open-source markdown editor that focused on speed and usability


Discover open source projects across all platforms

Projects