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.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Dropbox - Online Sync and File Sharing
TiddlyWiki - a non-linear personal web notebook
Google Drive - Access and sync your files anywhere
Confluence - Confluence is content collaboration software that changes how modern teams work
Mega - Secure File Storage and collaboration