WriteRoom is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The best Windows alternative is Manuskript, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to WriteRoom and loads of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to WriteRoom are FocusWriter (Free, Open Source), Dendron (Free, Open Source), iA Writer (Paid) and WriteMonkey (Freemium).
Manuskript is an open-source tool for writers, with outliner, character management, plot development, distraction-free editor, etc. Outliner Organize your thoughts and snippets in a hierarchical manner. Organize them as you wish, reorganize them on the go.
Dendron is an open-source, local-first, markdown-based, note-taking tool built on top of VSCode. It supports all the usual features you would expect like tagging, backlinks, a graph view, split panes, and so forth.
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.
Ommwriter is a simple text processor that firmly believes in making writing a pleasure once again, reinvindicating the close relationship between writer and paper. The more intimate the relation, the smoother the flow of inspiration.
novelWriter is a Markdown-like text editor designed for writing novels and larger projects of many smaller plain text documents. It uses its own flavor of Markdown that supports a meta data syntax for comments, synopsis and cross-referencing between files.