The W3C Markup Validation Service is a service based on SGML and XML parsers that checks the markup validity of Web documents, including HTML, XHTML, SMIL and MathML. Documents can be checked by URI, file upload or direct input. An experimental web service API is documented, along with a user's guide and explanations of error messages.
The Markdown Guide is a free and open-source reference guide explaining how to use Markdown, a markup language for formatting documents. It offers a getting started guide for novices, a basic syntax page, and extended syntax for tables, fenced code blocks and automatic links.
Quartz is a static-site generator that transforms Markdown content into websites. It offers Obsidian compatibility, full-text search, graph view, wikilinks, backlinks and LaTeX rendering through configurable plugins. The project requires at least Node v22 and npm v10.9.2, and sites can be deployed to GitHub Pages, Cloudflare, Netlify or Vercel.
OpenDyslexic is a typeface designed against some common symptoms of dyslexia. The newest version uses the SIL-OFL license, permitting personal, business, educational, commercial, books, ebook readers, applications and websites. It can be downloaded and used for free without mandatory fees, and optional donations and Patreon subscriptions are offered.
TextEditor is a free online tool that converts plain text into Unicode fonts, symbols, emoji, text faces and ASCII art. It also offers an emoji picker, password generator, case converter and an HTML editor, and the generated text can be copied into social media posts and profiles.
1001 Fonts helps clean, compare, sort, transform, count, or format text in the browser.
Unifoundry exists to help get free fonts and utilities into the hands of those who need them. It offers free fonts and utilities, a discussion on Hangul syllables, and a Unicode tutorial. The main effort is Unifont, which as of 20 June 2008 had a glyph for every printable code point in the Unicode BMP. Software is released under the GNU GPL version 2.0 or later unless otherwise noted.
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The Markdown Guide is a free and open-source reference guide explaining how to use Markdown, a markup language for formatting documents. It offers a getting started guide for novices, a basic syntax page, and extended syntax for tables, fenced code blocks and automatic links.
Quartz is a static-site generator that transforms Markdown content into websites. It offers Obsidian compatibility, full-text search, graph view, wikilinks, backlinks and LaTeX rendering through configurable plugins. The project requires at least Node v22 and npm v10.9.2, and sites can be deployed to GitHub Pages, Cloudflare, Netlify or Vercel.
OpenDyslexic is a typeface designed against some common symptoms of dyslexia. The newest version uses the SIL-OFL license, permitting personal, business, educational, commercial, books, ebook readers, applications and websites. It can be downloaded and used for free without mandatory fees, and optional donations and Patreon subscriptions are offered.
TextEditor is a free online tool that converts plain text into Unicode fonts, symbols, emoji, text faces and ASCII art. It also offers an emoji picker, password generator, case converter and an HTML editor, and the generated text can be copied into social media posts and profiles.
1001 Fonts helps clean, compare, sort, transform, count, or format text in the browser.
Unifoundry exists to help get free fonts and utilities into the hands of those who need them. It offers free fonts and utilities, a discussion on Hangul syllables, and a Unicode tutorial. The main effort is Unifont, which as of 20 June 2008 had a glyph for every printable code point in the Unicode BMP. Software is released under the GNU GPL version 2.0 or later unless otherwise noted.
