CozyRoc has a suite of Control Flow Tasks that are worth a look. We're using the SFTP (Secure FTP) and SSH Connection Manager on my current project.
Once we identified the need for SFTP, I looked around and identified a couple companies / products. The CozyRoc download was the only one I could make work.
I've communicated with the company a few times with questions about functionality. I found Ivan to be very responsive and refreshingly open.
We're planning to use other tasks in the suite as well: the Script Task Plus, Zip Task, and Database Partitions Task are slated for use. It's all good stuff and the price is extremely reasonable ($99.95!) - especially when compared to the competition.