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.
Chart.js - Easy, object oriented client side graphs for designers and developers.
Dropbox - Online Sync and File Sharing
D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Google Drive - Access and sync your files anywhere
Google Charts - Interactive charts for browsers and mobile devices.
Mega - Secure File Storage and collaboration