What are some alternatives?
When comparing Word Online and LEd, you can also consider the following products
Apache OpenOffice Writer - Open-source word processor of the Apache OpenOffice suite.
Actinic - Definition of actinic in the Medical Dictionary by The Free Dictionary
LibreOffice - Writer - Open-source cross-platform word processor.
TexMaths - TexMaths is an addon designed to provide LaTeX support into LibreOffice.
Google Drive - Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
LibreOffice - Math - Math, LibreOffice, math editor, ODF, OpenFormula, open standards