AbiWord - AbiWord is a free software word processor.
Scribes - A text editor for GNOME that combines simplicity with power.
LibreOffice - Writer - Open-source cross-platform word processor.
Big Huge Labs Writer - Writer is a free online distraction free writing environment provided by Big Huge Labs.
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.
Caret - Better Markdown Editor for Mac / Windows / Linux