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
GitHub for Atom - Git and GitHub integration right inside Atom
Google Drive - Access and sync your files anywhere
KanbanFlow - KanbanFlow is a Lean project management tool allowing real-time collaboration between team members. Supports the Pomodoro technique for time tracking.
Mega - Secure File Storage and collaboration
Hygger - Hygger - is an Agile project management tool with built-in prioritization.