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.
Textnow.com - It lets you text your friends, aka my only source of happiness
Dropbox - Online Sync and File Sharing
aTalk - An encrypted instant messaging with video call and GPS features for android.
Google Drive - Access and sync your files anywhere
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
Mega - Secure File Storage and collaboration