A complete multi-IM solution for OS X, Windows, your iPhone and the web.

The Flexibility of Trillian with a Beautiful Mac InterfaceTrillian for Mac is a fully-featured IM and social client, with all the usual Trillian concepts you're accustomed to -- connections, a connection manager, a contact list, tabbed chats -- helping you easily migrate from Windows to Mac. At the same time, the design of Trillian for Mac respects the user interface of Mac OS X, providing you with a seamless experience across your operating system.

Connect to Many Services
Trillian is a great tool to connect various instant messaging and social networks, including but not limited to AIM, ICQ, Google Talk, Windows Live Messenger, Yahoo! Messenger, and Facebook Chat. You can even connect to multiple accounts within the same IM network!

Itsy Twitter app for Mac

Itsy is a small, simple Twitter app for your Mac. Itsy won't hog up your screen or do other crazy things.

• See and send tweets, replies, DM's
• Mentions integrated into timeline
• Inline yfrog and twitpic viewing
• Reply chains
• Growl notifications
• Twitter Search

Connect to Facebook, MySpace, Twitter, AIM and more...in one place

STATUS SYNC
Update your status across all your services at once

EASY SHARING
Share links, images & videos across all your networks

EASY SHARING
Share links, images & videos across all your networks

REAL-TIME UPDATES
Get all your friend updates wherever you are on the web

Bluebird Twitter Client

Bluebird 1.0 Beta 2.1 is a beta release. It is for use by people not afraid of software that may have a few bugs in it.

Stay on top of your Twitter timeline with Echofon for Mac. The beautiful, subtle interface will be a welcome addition to your Mac’s desktop.

Flexible Interface Echofon for mac suits those who do intense Twittering, and those who want to something that stays out of their way until they need it. The interface contracts and expands to your ideal size, and the drawer will show you details only when you need it.

Browser Drawer Echofon’s unique browser-like drawer lets you view information about specific users, or read conversations without losing access to your timeline. Open the drawer!

Drag-and-Drop Photo Posting Posting photos to Twitter couldn't be easier. Just drag a photo onto the Echofon window to attach it to your tweet.

Syncs with your iPhone Echofon for Mac syncs unread tweets with Echofon pro on your iPhone.

Friendz is an application for seeing what your Xbox Live friends are doing, without having to turn on your Xbox.
Current features:

• See which of your friends are online.
• Growl notifications for when you get new messages.
• Growl notifications for when all/selected friends come online.
• The ability to send/reply to messages.
• The ability to view and delete messages.
• Send/Accept/Reject friend requests.
• Delete friends.
• Achievements.

 Instantbird is a multi-protocol Instant Messaging client. Using it, you can connect to all your different IM accounts. It uses the Mozilla rendering engine to display IMs, and the Pidgin libpurple to connect to the different networks. Instantbird is a free and open source software. So you are free to use, distribute and modify it.

Fire is a free Instant Messaging client for Mac OS X. It supports the seven most popular Instant Messaging services:

• AIM®
• ICQ®
• irc
• Jabber® (including Google® Talk and Apple® iChat Server)
• MSN®
• Yahoo! Messenger®
• Apple Bonjour® (aka Rendezvous)

Scalaris is a Twitter client built as minimal and unintrusive as possible. It shows your friend's tweets as Growl notifications. It runs on Mac OS X 10.4, but later betas (from 1.0b5) require OS X 10.5.
It allows you to send tweets without stopping your workflow. And because Scalaris uses Growl, the customization options are endless. Go into System Preferences and set your custom display styles under the Growl preference pane.

Telephone is a VoIP program which allows you to make phone calls over the internet. It can be used to call regular phones via any appropriate SIP provider. If your office or home phone works via SIP, you can use that phone number on your Mac anywhere you have decent internet connection.

Telephone is really easy to use. It's for the Mac only.

Phone numbers and SIP addresses from Mac OS X Address Book application can easily be dialled with Telephone. Use email field with the custom label “sip” to store contact's SIP address.