Big Huge Labs Writer - Writer is a free online distraction free writing environment provided by Big Huge Labs.
Apache OpenOffice - Apache OpenOffice is an open source, office document productivity suite.
Office Online - With Office Online you can view, edit, and share Word, Excel, PowerPoint, and OneNote files on your devices using a web browser, so you can work anywhere.
Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
Caret - Better Markdown Editor for Mac / Windows / Linux
SoftMaker Office - SoftMaker Office is one of the most powerful and reliable office suite that is fully compatible with the MS Office Suite.