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.
Meazure - What are the dimensions of that image? How big is this window?
Dropbox - Online Sync and File Sharing
Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.
Google Drive - Access and sync your files anywhere
On-Screen Ruler - lightweight, free, semi-transparent ruler
Mega - Secure File Storage and collaboration