There's another one called Cyberduck. However, it appears this is now shareware and costs $23. I remember using it for free in 2014. I'm not sure if that was just a demo or if they changed to a commercial product.
I'm not sure of any other GUI applications you can use. I know the Finder supports connecting to FTP servers. However, you connect in read-only mode. It should also be possible to use Terminal if you want to use the command line.
edit
I found a version of File Zilla for macOS. You can download it from https://download.filezilla-project.org/ … undled.zip
I'd suggest not installing the extra bundled crap it comes with. It seems like it works with VoiceOver. I don't know of any FTP servers to connect to off the top of my head, so can't test if the interface for browsing files is accessible.
Grab my Adventure at C: stages
Right here.