Google Drive - Docs
Free
Google Docs is a cloud based document editor from Google.
Quip
Commercial
Quip is a collaborative productivity software suite for mobile and the Web.
Zoho Writer
Free Personal
Zoho Writer is a fully-featured word processor on the cloud, designed for collaborative work that gives you everything you need to create powerful documents.
Compare Etherpad with alternatives
Compare Google Drive - Docs and Etherpad and decide which is most suitable for you.
Compare Zoho Writer and Etherpad and decide which is most suitable for you.