I'm in the process of writing (or more accurately, rewriting) a large php project with the help of one other developer. Forgive me if this is on here somewhere (I've been looking around the web for a few days), but is there any sort of mac php editor or app that will auto-synchronize my files between a designated folder and my server (given the proper ftp information)?

I know PHPDesigner does it on Windows but I can't find anything comparable on Mac. It's a huge pain to re-download the entire directory every time I want to work on something, since we tend to be changing lots of files at once. My co-developer is using PHPDesigner and I have to admit I'm a bit jealous.