Dropbox is an off-site server for file syncing, storage and sharing which allows users to save & share files of any format & access them anywhere, on any device.
Google Drive is a cloud storage and backup platform to access files, docs, photos & more, store them in a safe place, and collaborate with other people.
Skype is a multi-channel communications software that provides video chat, voice calls, instant messaging & more to business of all sizes, across the world.
Microsoft Office is a suite of desktop productivity applications and client and server software designed for data analysis, presentations and numeric manipulations.
Wire is a secure messaging & collaboration tool for businesses with end-to-end encryption, group chats, video & voice calls, file sharing, screen sharing & more.