EtherCalc is a web spreadsheet. Your data is saved on the web, and people can edit the same document at the same time. Everybody's changes are instantly reflected on all screens.
etherpad service hosted by Riseup. Etherpad is a software libre web application that allows for real-time group collaboration of text documents. Riseup does not store IP addresses, we require https, and pads are automatically destroyed after 30 days of inactivity.
from https://github.com/Pita/etherpad-lite
TitanPad TitanPad lets people work on one document simultaneously We are rescuing EtherPad for your use.