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.
from https://github.com/Pita/etherpad-lite
TitanPad TitanPad lets people work on one document simultaneously We are rescuing EtherPad for your use.
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.