Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
FTP Synchronizer - Secure and high performance FTP File Sync product
Vaultedge - Access all your documents in one place.
Polo File Manager - Software for Linux
Google Cloud Search - Search across all your company's content in G Suite.
Rodent - Rodent is a project file manager for browsers; it helps you organize your work without saving files locally.