Developer website: Nullriver Software Inc.
Why pay for all these networks when you can play for free using Amaryllis and the Kai network! Kai achieves its magic through tunneling and lets you enjoy your favorite online games without having to subscribe for any paid service.
Linux and Windows clients and binaries are also available at the site mentioned below.
IMPORTANT: You will need to download the latest Kaid OS X binary from http://www.teamxlink.co.uk/. For general help, visit the forums there. See the ReadMe document for further details.