I've used Filezilla, but recently it has started crashing whenever I've tried to transfer something. I switched over to SmartFTP but it's very bulky compared to Filezilla. I like Filezilla the most vs. SmartFTP, CuteFTP, and WS_FTP Pro.
I can't believe anyone would use Filezilla on purpose. CuteFTP and then a distant second would be wsftp
Filezilla is pretty good most of the time, I have used it for years. But lately it will hang up if have a large local file listing/structure. I hate waiting for a program to respond, just to do my work. Cute FTP has proved to be very stable for this and has worked well, but I don't love the 69 price tag... just finished the 30 day trial, and debating paying for pro version. I will try this FlashFXP everyone mentioned and see how it goes.