Blank Slate is described as 'Get thoughts down quick, do things with them later. Just start typing'. There are more than 50 alternatives to Blank Slate, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and iPhone. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Typora or Mark Text. Other great sites and apps similar to Blank Slate are FocusWriter (Free, Open Source), ghostwriter (Free, Open Source), StackEdit (Free, Open Source) and iA Writer (Paid).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
No excuses. No distractions. Just write. ghostwriter is a feature-rich text editor using Markdown syntax which makes it suitable for note-taking, document redaction, simple HTML website creation and much more.
The key to good writing is not that magical glass of Bordeaux, the right kind of tobacco or that groovy background music. The key is focus. What you need to write well is a spartan setting that allows you to fully concentrate on your text and nothing but your text.
Haroopad is a markdown enabled document processor for creating web-friendly documents. You can author various formats of documents such as blog article, slide, presentation, report, and e-mail as if experts did.