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.
Dxtory - Tool to display FPS in video games, make screenshots, record videos.
Dropbox - Online Sync and File Sharing
ConnectWise Control - ConnectWise Control is a mobile app that allows you to instantly connect with another system from anywhere with a connection to the internet. The software not only comes in a mobile app, but it has a desktop version as well for complete coverage.
Google Drive - Access and sync your files anywhere
Droplr - Droplr is a tiny application that aims at helping people share things easier.
Mega - Secure File Storage and collaboration