rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
FileCloud - FileCloud is an enterprise file share, sync and mobile access solution.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
S3 Browser - S3 Browser is the name of an easy and simple to use Amazon S3 clients for the Windows operating systems.