kerio client

Twitter client with a real OS X look and feel.

A beautifully designed and very functional Twitter Client

a simple and elegant Twitter client

A Twitter client with message store capability

Instantbird is a multi-protocol Instant Messaging client.

An Xbox Live client that can check what are your Xbox friends doing

An IRC client for Mac OS X

Syrinx is a fully customizable twitter client designed for Leopard (OS X 10.5+).

Portable Thunderbird OS X is the popular Mozilla Thunderbird email client.

Organizations can easily migrate critical client-server applications to the web.