Lynis - Security auditing tool for systems running Linux, macOS, BSD, and other UNIX-based systems.
BoxCryptor - Boxcryptor encrypts your sensitive files before uploading them to cloud storage services like Dropbox, Google Drive, Microsoft OneDrive, Box, and many others.
Silverback - Silverback 3
Mega - Secure File Storage and collaboration
Chkrootkit - Chkrootkit is a Linux tool to locally check for signs of a rootkit. It contains:
Google Drive - Access and sync your files anywhere