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.
Dropbox - Online Sync and File Sharing
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
Google Drive - Access and sync your files anywhere
OpenBoard - The OpenBoard software is an interactive white board software.
Mega - Secure File Storage and collaboration
Conceptboard - Instant Whiteboards for Teams & Projects