Apps similar to Protowords include Zettlr, which is free and open source. Other options are Typora, ghostwriter, Manuskript and Scrivener. There's no shortage of Text Editors like Protowords, with more than 100 alternatives for Mac, Windows, the web, Linux and iPhone.
Ulysses is a text editor for creative writers. Used by bloggers, poets, students and published novelists all over the world, it offers an integrated environment to brainstorm, draft, revise and even submit text on a professional level.
Germany
EU
Free offline worldbuilding and story creation tool with dozens of templates, complex tagging options, document linking, and project-wide search. Template examples: characters, places, events, religions, currencies, magic, species, languages.
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.
As easy to use as a word document or bulleted list, and as powerful for finding, collecting, and connecting related ideas as a graph database. Collaborate with others in real time, or store all your data locally.
United States
A smooth yet powerful writing experience for devoted authors. With only wanted features and native workflow it runs faster than all your previous apps combined.
Focus on your words not the interface. Quoll Writer is a writing application that helps you focus on your words. Clean and uncluttered. Feature rich. Features are where you would expect them to be.
Australia
Offers fast, distraction-free note-taking via a high-performance editor with real-time Markdown, local-first storage, image support, Kanban task boards, intuitive drag-and-drop, keyboard shortcuts, configurable themes, fast search, and cross-platform access.
Israel
The only app you'll need to write your novels and build your worlds. Organize your thoughts and cross-reference anything at any time.
United States
Writemonkey is a Windows zenware writing application with an extremely stripped down user interface, leaving you alone with your thoughts and your words.
SloveniaEU
Untold Novel is a fresh new approach to planning your next bestseller. It helps you keep all your notes, ideas, characters, locations, and much more organized in one convenient place.
A simple tool for building stories and the worlds they live in.
United States
yWriter is a writing tool that uses "scenes" as a unit of text and allows you to associate that text with all manner of story elements (characters, locations, items) as well as place it and rearrange it within the context of chapters.
Australia
