When comparing JotterPad vs Dark Room, the Slant community recommends JotterPad for most people. In the question“What are the best distraction-free word processors?” JotterPad is ranked 7th while Dark Room is ranked 12th. The most important reason people chose JotterPad is:
Supports the CommonMark Markdown format.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports Markdown
Supports the CommonMark Markdown format.
Pro Allows customizing style
You can change the font to suite your needs.
Pro RTL support
Supports right-to-left languages.
Pro Portable
As long as the target machine has .NET Framework 2.0 or later installed (and most Windows machines do by default) the software can be run without requiring an install. It can be carried around on an external device, such as a USB thumbstick, and run directly from that.
Pro Decent customization options
Pro Completely free
Cons
Con Free version includes a PDF watermark
If you're using the free version of the application PDF exports will have a watermark.
Con Requires .NET to be installed
It depends on .NET before it is able to run.