I'm the creator of this tool. I like to use my local text editor (Sublime Text) to work on code, but I need to run that code on a remote VPS. Running scp every time I save gets old fast, so I needed a better way. I made unisync, a continuous syncing command line program for developers. You install it locally and on your VPS or remote server, create a 4-line config file (locally), and run it. It'll connect to remote over ssh and sync changes it both directions for as long as it's running. It will "catch up" if you shut it down and later run it again.
It was inspired by a similar program called unison, which is powerful but is starting to show its age.