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.
Pennywise - Cross-platform application to open any website or media in a floating window
Dropbox - Online Sync and File Sharing
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Google Drive - Access and sync your files anywhere
PiPer - A DIY Minecraft computer to build gadgets
Mega - Secure File Storage and collaboration