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.
Zeplin - Collaboration app for UI designers & frontend developers
Dropbox - Online Sync and File Sharing
Pamela for Skype - A versatile and easy to use Skype audio and video recording software. Features
Google Drive - Access and sync your files anywhere
ActiveWords - Auto correct on steroids
Mega - Secure File Storage and collaboration