FileZilla Client is a free, open source FTP client. It supports FTP, SFTP, and FTPS (FTP over SSL/TLS). The client is available under many platforms, binaries for Windows, Linux and Mac OS X are provided.
To install Filezilla open a Terminal window (Applications -> Accessories -> Terminal) and copy+paste the following lines:
sudo add-apt-repository ppa:n-muench/programs-ppa
sudo apt-get update
sudo apt-get install filezilla
When installed you can find Filezilla under Applications -> Internet -> Filezilla.
Filezilla Homepage
New features:
Disabled automatic negotiation of FTP over TLS introduced in 3.4.0-beta1. Will be added in a future version instead
Add checkbox to settings dialog to not save passwords
Add timestamp columns to successful and failed queue tabs showing when the transfers completed or failed
Bug fixes:
Fixed infinite loop in TinyXML when loading settings from corrupt XML documents
Parsing MDTM reply now takes seconds into account
MSW: Handling of paths relative to the drive-root in local directory input box
Compatibility with MVS listing containing PO-E type entries
Fix Resizing issues with manual transfers dialog
MSW: Remote file editing did not correctly handle files that were still open