- collaborative docs like google docs, google sheets, quip. 
  - cloud sync like dropbox (also evernote, icloud, google drive)
  - group voice chat
  - open source package management (all of rpm, yum, dpkg, ports, npm , cpan , etc, etc ) – at a high level, run 1 command , get all the deps you need (and a license to use them) to build your software.