As far as FTP clients go, Core FTP Lite is one of the most comprehensive out there. It allows you to do pretty much anything that you can do with FTP transfers. It features everything from SFTP (SSH), SSL, TLS, IDN, browser integration, site to site transfers to FTP transfer resume, drag and drop support and command line transfers.
Where Cute FTP really distinguishes itself is through it's security features. Not many FTP clients support so many different security protocols meaning you can upload and download to FTP servers with peace of mind. This is essential if you're administering a website that holds. The list of features doesn't stop there though and is truly mind boggling. It also supports Auto retry of failed transfers, bandwidth control throttle, remote file searching and .htaccess/.htpasswd editing amongst many many more.
If you're looking for a fully comprehensive free solution to FTP transfers, then you can't do much better than Core FTP Lite. If you're new to FTP transfers however, you'd probably be better off with something a bit simpler.
- Wildcards for upload/download prompt fixed MVS issue with large file sizes in listings fixed Site profile issue in templates with multiple sites, fixed GUI updates/fixes