GoFTP

GoFTP is my new favourite FTP client, for one main reason, its fast, and i mean FAST, you can see a chart at GoFTP website but for me that i have to work with a lot of joomla sites, download and upload them, it's very nice, i definitely reccommend it.
Quoting GoFTP website here are a list of nice features

• "Instant Connect" Technology
• "Instant Directory" Technology
• Multi-connection transfers for maximum bandwidth utilization !!
• On the fly file compression for amazing transfer speeds !!
• You simply have to try this FTP program to believe it.

Just try it, you wont regret ;)