Quip

Quip is the modern productivity suite that simplifies your life and helps your team get work done faster. It combines chat, docs, task lists, and spreadsheets in one app - making collaboration fast and easy. Quip enables you to create and share with your family, friends, or colleagues from any device - including your Mac, iPad, and iPhone.

• Share Documents and Task Lists - Take notes, share grocery lists, organize task lists, edit docs with your office co-workers, collaborate with any group or team on projects.
• Chat and Messaging - Real-time chat and messaging is integrated seamlessly for easy collaboration, so you never have to switch to email.
• Spreadsheets - Full-featured spreadsheets with support for over 400 functions.
• Access on Any Device, Any Time - All of your chats, docs, task lists, and spreadsheets are available on all of the devices you use - Mac, iPhone, and iPad. Easily review changes, comments, annotations to your docs and spreadsheets from your iPhone and iPad.
• Import and Export - Import your documents from Dropbox, Evernote, Google Drive, Box, Google Docs, and more. Export documents to PDF and Microsoft Office. Export spreadsheets to Microsoft Excel. Import your address book from Gmail, Yahoo, Hotmail, Microsoft Outlook, Google, or iCloud.

Note: Quip can be upgraded to Quip Plus or Quip Advanced. Further information can be found here.