I've used a dozen FTP clients over the years, but only a few of them work with automatic updates when saving.
For example, The FireFTP addon for FireFox is great. You double click a file.. it opens in notepad++.. and when you click save, it immediately uploads the new version of the file to the server. Further changes can be made and each time you hit save, it uploads instantly.
I'm trying to find a standalone (preferably portable) FTP client that does this without prompting.
FlashFXP waits for you to hit ok and can desync if you hit cancel then reopen.
Filezilla prompts after save is detected but no way to just be automatic.
Coreftp prompts after file is closed
I've not found one yet that supports an automatic session or maybe I'm just not finding it