From foonas

This is a list of serial communications applications for several Linux variants and other operating systems that are useful for firmware and OS installation & maintenance operations from your platform of choice with foonas & foonas-em.

Linux

minicom, compile from source or install via distribution package manager

Mac OS X

minicom, available via DarwinPorts

zTerm

Windows

Hyperterminal (Comes with Windows)

Putty (0.59 or later) - alternative version (stores config in files instead of registry)