Windows 7 Tip: 
Nambu is a new Mac Client for Twitter and Friendfeed. The Nambu Network is a preview of a Mac application that brings together various social networking sources and enables you to view your Twitter conversations as if you were using an email client. Scroll through incoming tweets, view sent messages and quickly see who’s following you or who you are following. There’s also a version of Nambu for your iPhone, so you can tweet on the road. Nambu primarily supports Twitter and Friendfeed, so far.
Read Also: 110+ Best Twitter Tools
Nambu was a free download, and easy to set up for Twitter accounts (supports multiple accounts), and it has 3 different viewing options. Single Column View, Sidebar View (like iTunes), and Multiple Column View (like TweetDeck). There are drop down options in the Single and Mulitple View so that you can customize the views. There is a button that appears at the top of the Mulitple View window that allows you to add as many columns as you want.
Download Nambu For Mac here and For Iphone Here
your download link is broken. forgot the / between .com and download.