Add MarkView to the Markdown tool directory

_tools/markview.md

@@ -0,0 +1,79 @@
+---
+title: MarkView
+category: "documents"
+description: "A free desktop Markdown reader for macOS, Windows, and Linux."
+icon: markview.png
+website: https://markview.io
+syntax:
+  - id: headings
+    available: y
+  - id: paragraphs
+    available: y
+  - id: line-breaks
+    available: y
+  - 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
+    notes: "Use a recognized language tag on the fenced code block."
+  - id: footnotes
+    available: y
+  - id: heading-ids
+    available: y
+    notes: "Automatic heading IDs and explicit {#custom-id} syntax are supported."
+  - id: definition-lists
+    available: n
+  - id: strikethrough
+    available: y
+  - id: task-lists
+    available: y
+    notes: "Checkboxes are rendered read-only."
+  - id: emoji-cp
+    available: y
+  - id: emoji-sc
+    available: y
+  - id: highlight
+    available: n
+  - id: subscript
+    available: y
+  - id: superscript
+    available: y
+  - id: auto-url-linking
+    available: y
+  - id: disabling-auto-url
+    available: y
+    notes: "Wrap the URL in a code span."
+  - id: html
+    available: p
+    notes: "Basic HTML formatting is supported. Active content is restricted by the desktop application."
+---
+
+[MarkView](https://markview.io) is a free desktop application for reading Markdown files on macOS, Windows, and Linux. Open a file from the app, drag it onto the window, or use your operating system's Open With command.
+
+It displays tables, code blocks, Mermaid diagrams, and LaTeX equations. It also includes document search, a table of contents, light and dark themes, and printing. No account or document upload is required. The app reads Markdown files without editing them.
+
+MarkView is developed by Doug Kerwin. Official downloads are available from the product website.
+
+https://markview.io
+
+{% include tool-syntax-table.html %}