CotEditor
CotEditor is exactly made for macOS. It looks and behaves just as macOS applications should. CotEditor launches so quick that you can write your text immediately when you want to. CotEditor is developed as an open-source project that allows anyone to contribute. Colorize more than 50 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown. You can also create your own settings. Split a window into multiple panes to see different parts of your document at the same time. Inspect Unicode character data of each selected character in your document and display them in a popover. There are no complex configuration files that require geek knowledge. You can access all your settings including syntax definitions and themes from a standard preferences window. You don't need to lose your unsaved data anymore. CotEditor backups your documents automatically while editing. Check and list-up the characters in your document that cannot convert into the desired encoding.
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WordPad
WordPad is a basic text-editing app you can use to create and edit files, include text with different fonts and colors, insert pictures, and add links to other files. You can use WordPad to open and save text files (.txt), rich text files (.rtf), Word documents (.docx), and OpenDocument text files (.odt). Files in other formats will open as plain text files and might not appear as expected. Some features, like headers, footers, and annotations, aren’t supported in WordPad. If you open a file with these features and then save the file in WordPad, you’ll lose the content in these features. If you want to change such a file, but don’t want to lose the original content, tap or click Save as and save the file with a different name. That way you can make changes to a copy of the file while keeping the content in the original file intact. For more info about what each button does, press and hold the button for a description (or if you’re using a mouse, point to the button).
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Typora
Typora gives you a seamless experience as both a reader and a writer. It removes the preview window, mode switcher, syntax symbols of markdown source code, and all other unnecessary distractions. Instead, it provides a real live preview feature to help you concentrate on the content itself. Typora allows you to manage your files easily, providing both file tree panel and articles (file list) side panel, allows you to manage your files easily. Organize your files your way, including putting in sync services, like Dropbox or iCloud. Automatically see the Outline structure of your documents in outline panel, which allows you to quickly go through the document and jump to any section with one click. Export to PDF with bookmarks. Go further and export or import. More formats, including docx, OpenOffice, LaTeX, MediaWiki, Epub, etc, can be exported or imported. See how large your document is in words, characters, lines, or reading minutes.
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Firepad
Firepad is an open source real-time collaborative text editor. It provides true collaborative editing, complete with intelligent operational transform-based merging and conflict resolution. Firepad can render documents using the CodeMirror, Ace, or Monaco editors, and its operational transform code borrows from ot.js. Behind the scenes, Firepad uses the Firebase Realtime Database for cloud data storage and synchronization. You can build any application that requires collaborative editing of text documents. Firepad supports both rich text and code editing out-of-the-box, and it's easy to extend for other use cases. Firepad was built by Michael Lehenbauer and the team at Firebase. There are many other features that could be added, please star Firepad on GitHub and send over a pull request when you have things to contribute! You can build any application that requires collaborative editing of text documents.
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