AS/400 client for Linux?

Hi everybody, Has anyone got a favourite AS/400 Linux client OSS or freeware that works just like the original IBM AS/400 client software for Windows? The Telnet Terminal Emulation Software like "TN3270 Plus" for Windows could be an example. I have installed "TN3270 Plus" with wine. It did work, but a freeware Linux version would be preferable. :-) Al