There's also Ethercalc [https://ethercalc.org/ https://ethercalc.org/], a spreadsheet version of Etherpad. Etherpad, Ethercalc and Mailpile (and more!) are all

There's also Ethercalc [https://ethercalc.org/ https://ethercalc.org/], a spreadsheet version of Etherpad. Etherpad, Ethercalc and Mailpile (and more!) are all available on top of Sandstorm [https://sandstorm.io/apps/ https://sandstorm.io/apps/] - which basically makes it easier to manage them all.