For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Momentum - Agile goal and performance management
Dropbox - Online Sync and File Sharing
New Tab by Flickr - Get a beautiful photo each time you open a new tab
Google Drive - Access and sync your files anywhere
Gratitude Flow - Gratitude Flow is a web extension that allows you to share and receive gratitude on your new tab with real people around the world.
Mega - Secure File Storage and collaboration