If you are tired of logging into five different browser tabs just to move one spreadsheet, download the Portable version. Keep it on your desktop. Keep it on your thumb drive.

The problem? Moving files between these "walled gardens" usually feels like asking two rival countries to open their borders. You either download, upload, delete, and repeat—or you pay for a clunky sync service that requires a full software installation and admin rights.

The free version limits you to two simultaneous transfers and one account per provider. The Pro license is a one-time payment (not a subscription, bless them). For anyone who touches cloud storage daily, it pays for itself in the first hour. Have you used Air Explorer to migrate clouds? Or do you have a different portable tool you swear by? Let me know in the comments below.

If you are a power user who hates bloatware, jumps between different workstations, or simply values your time, this little utility is about to become your favorite travel companion. At its core, Air Explorer is a file manager for the cloud. Think of it as Windows Explorer or Finder , but one that can log into Google Drive, OneDrive, Dropbox, Box, Mega, pCloud, and even SFTP servers simultaneously.