LockHunter - It is a free tool to delete files blocked by something you do not know.
Google Drive - Access and sync your files anywhere
Wise Force Deleter - Delete Any File That Windows Can’t Delete.
Dropbox - Online Sync and File Sharing
FileASSASSIN - FileASSASSIN is an application that can delete any type of locked files that are on your computer.
ShareFile - Secure file sharing and sync