Dropbox for Teams
Dropbox is amazing. The cross-platform, free services allows users to sync files and folders across multiple computers and devices easily.
While I use Dropbox with a group of 4, the service can scale to meet the needs of many more users, via Dropbox for Teams. Starting with 1,000GB for five people, Teams is actually $200 cheaper a year than purchasing the same five users 200GB pro accounts. Additionally, Teams comes with unlimited version history, phone support and Active Directory integration. The new version adds an extensive IT Admin panel, allowing admins to execute fine-grain control over sharing and allowed devices, making Dropbox a better fit in the enterprise than ever before.