add buttondown

Author: catdevnull

_tools/buttondown.md

@@ -0,0 +1,79 @@
+---
+title: Buttondown
+category: "email"
+description: "Buttondown is an email platform to run your newsletter."
+icon: buttondown.png
+website: https://buttondown.com/
+syntax:
+  - id: headings
+    available: y
+  - id: paragraphs
+    available: y
+  - id: line-breaks
+    available: n
+  - id: bold
+    available: y
+  - id: italic
+    available: y
+  - id: blockquotes
+    available: y
+  - id: ordered-lists
+    available: y
+  - id: unordered-lists
+    available: y
+  - id: code
+    available: y
+  - id: horizontal-rules
+    available: y
+  - id: links
+    available: y
+  - id: images
+    available: y
+  - id: tables
+    available: y
+  - id: fenced-code-blocks
+    available: y
+  - id: syntax-highlighting
+    available: y
+  - id: footnotes
+    available: y
+  - id: heading-ids
+    available: p
+    notes: "Automatically generated. There's no way to set custom heading IDs."
+  - id: definition-lists
+    available: n
+  - id: strikethrough
+    available: y
+  - id: task-lists
+    available: n
+  - id: emoji-cp
+    available: y
+  - id: emoji-sc
+    available: n
+  - id: highlight
+    available: n
+  - id: subscript
+    available: y
+  - id: superscript
+    available: y
+  - id: auto-url-linking
+    available: y
+  - id: disabling-auto-url
+    available: n
+  - id: html
+    available: p
+    notes: "Some HTML is sanitized."
+see-also:
+  - name: Using Markdown in Ghost
+    link: https://ghost.org/faq/using-the-editor/#using-markdown
+---
+
+[Buttondown](https://buttondown.com) is an email platform, similar to the now-defunct [TinyLetter](https://buttondown.com/comparisons/tinyletter), that allows you to send emails to subscribers. It also has integrations with many other platforms to automatically publish or add subscribers, amongst other possibilities.
+
+The email editor [supports Markdown](https://buttondown.com/features/markdown), with the possibility to switch to a WYSIWYG editor for those who prefer it.
+
+{% include image.html file="/assets/images/tools/buttondown.png" alt="Buttondown email editor" %}
+
+There are a couple minor compatibility issues noted below but, generally speaking, Buttondown has solid Markdown support. According to [their docs](https://docs.buttondown.com/using-markdown), it uses Python-Markdown for parsing and rendering along with a few extensions. The live editor is fairly intuitive and gives you a preview on how the email will look in both the archive and in email clients like Gmail. Copying and pasting Markdown-formatted text into the editor works the way you'd expect it to.
+
+{% include tool-syntax-table.html %}