Microsoft Write

Write (also called Microsoft Windows Write, Microsoft Write, Windows Write) is the word processor that came with Microsoft Windows version 1.0 through 3.11, as well as Microsoft Windows NT through version 3.5. All versions were able to read and write .wri files, and later versions were also able to read and write Microsoft Word .doc files. It was replaced with Microsoft WordPad with the advent of Windows 95 (which could read Write format, but couldn't save to it).

Software

 * LibreOffice v5.1+
 * libwps
 * Converting MS Write to RTF (copy at archive.org)
 * OSPlus Text Editor - An old open source project with a WRI to RTF converter (src/convert/txtwrite.c). Likely predecessor of libwps's Write support.

Sample files

 * https://telparia.com/fileFormatSamples/document/wri/