When comparing Smartdown vs Inkdrop, the Slant community recommends Inkdrop for most people. In the question“What are the best open source Markdown editors for UNIX-like systems?” Inkdrop is ranked 2nd while Smartdown is ranked 33rd. The most important reason people chose Inkdrop is:
It's useful for taking notes for programming.
Specs
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Pros
Pro Integrated file library
You can add directories to the sidebar. These directories can be from cloud services (like Dropbox for example).
Pro Advanced Markdown support
Smartdown supports Critic Markup and MultiMarkdown flavors of Markdown that add advanced functionality, like tables, footnotes, etc.
Pro Customizable
The app can be themed and the layout can be changed around.
Pro Markdown with code syntax support
It's useful for taking notes for programming.
Cons
Con Not Free
Smartdown costs $19.99.
Con Aimed at programmers, not general use
Optimized for programmers, app developers, coders. Not for storing recipes, images, videos, etc.