Document.Editor is a free and open-source word processor for Windows Vista, 7, and 8/8.1. It features a multitab interface with a ribbon-style UI, built using VB.NET and Windows Presentation Foundation (WPF).

In terms of functionality, Document.Editor supports several different file formats for both opening and saving documents. You can open FlowDocument, Docx, HTML, and plain/rich text formats, and save in FlowDocument, Docx (text only), HTML, and plain/rich text formats as well. The program supports various startup options, like opening a new document, loading previous documents, and more.
Of course, Document.Editor also offers several useful editing commands, such as undo/redo, cut/copy/paste (and cut/copy/paste paragraph and line), delete (and delete paragraph and line), select all (and select paragraph and line), as well as find, replace, and go to.
You can also insert objects, images, links, text files, symbols, tables, videos, horizontal lines, date, time, headers, and footers directly into your documents. Further, you can format your documents with a variety of style options, such as font type/color, highlight color, bold/italic/underline/strikethrough/subscript/superscript, indent more/less, bullet/number lists, align left/center/right/justify, line spacing, and ltr/rtl settings.
Document.Editor even offers additional features like Spell Check, Text to Speech, Translate, and Definitions. And if you need to export your documents, you can save them as Wordpress, Xps, email, ftp server, zip archive, image, or sound files.
Finally, for those with a bit of technical know-how, Document.Editor includes a plugin system that can be customized to enhance the program's functionality even further. Although the system only supports inserting text into a document at present, it will eventually support other things like images and tables. If you want to take advantage of this system, simply turn it on in the options dialog and check out the HelloWorld plugin for a basic overview. Help for plugins will also be coming soon.
Version 2021.0: Cleaned up installer