Trillian is a multinetwork chat client that currently supports mIRC, AIM, ICQ, MSN, and Yahoo Messenger.

Trillian is going free for desktop and mobile, starting today with Trillian 5.

Themes, an awesome activity history viewer, and all the rest of Trillian’s great features will now be available to everyone! This is an exciting step forward and means our users will always experience the best products we have to offer. To continue to reward our amazing paying customers, Trillian Pro will carry on as a way to contribute to our development efforts directly, hide ads across all versions, and unlock the ability to store your chat history online. We hope you’re as excited as we are and will continue to support Trillian and spread the word!

The free versions of our mobile products are not live yet but we are working on finishing them up right now. We’ve put a brief Q&A together below with additional details – happy chatting, and thanks for using Trillian.

Features:

• Works and looks like Windows
• The UI is designed with Windows in mind. Our Trillian Cordonata skin is designed to fit the colors of Windows XP perfectly, while Trillian also supports stunning Aero Glass effects in Windows Vista.
• Handy Contact List [Premium Feature in Trillian Astra]
• Your contact list can float or be docked as a "sidebar", making it easy to access your contacts by moving your mouse to the side of the screen.
• Integration with Notification Area
• Notifiers appears near the clock on your Windows Taskbar, informing you of your newest tweets, latest chat messages, and more.
• Drag and Drop across software
• A simple drag and drop of files, text, or links allows you to easily share media from Windows Explorer and most major web browsers.

What’s going free? All previous Trillian Pro features: the ability to sign in from multiple locations, themes, the activity history viewer, and every other minor feature previously available to Pro subscribers only! We are also hard at work on free versions of all mobile editions of Trillian, which should be making their way to an app store near you shortly.

How will the new Trillian Pro service work? Pro service can be purchased yearly. We’re setting the price at $12 per year, or basically a dollar per month. As long as your account is a valid Pro account, you won’t see advertising on any platform and can store your chats online. However, if you’ve already purchased Trillian 5, you’ve been grandfathered into Pro! See the question below for the details.

What happens to me as a paid Trillian 5 customer? You’ve been automatically grandfathered into the new Trillian Pro. You shouldn’t see any advertisements (ever!) and chat history storage should be unlocked in preferences (for as long as you use Trillian 5). Thanks for your support!

What happens to me as a paid Trillian 4 customer? You can continue to run paid copies of Trillian 4 without seeing advertisements. Thanks for your support!

What happens to me as a paid mobile customer? You will continue to receive free software updates and will not see any advertisements, but synchronized chat history will only be available if you upgrade your account to Pro status. Thanks for your support!

What happens when my Pro membership lapses? Advertisements will return, but you’ll always have read and delete access to the chat history you’ve already generated. In addition, all desktop versions of Trillian store chat logs to disk locally, which will continue to populate. The conversations on any of your desktop computers will be retroactively uploaded as soon as you renew Trillian Pro.

How will advertising work? We’ll be utilizing standard advertisement solutions on the mobile side, and have created beautiful ad units on the desktop side. Desktop ads are organic members of your chat window – meaning they scroll away naturally – and do not animate, do not play sounds, and can be hidden on an individual basis.

Download notes:
* Alternatively you can download the latest beta version of this software.

What's New:

• 13482 FIXED [OSCAR] Add preference to not send HTML in outgoing messages
• 13484 FIXED [OSCAR] Auto-responses not sending correctly
• 13486 FIXED [OSCAR] HTML encoding issues in status messages
• 13483 FIXED [XMPP] Avatars mismatched in contact list
• 13485 FIXED [XMPP] Problems blocking Google contacts
• 13477 FIXED [Facebook] Fixes crash with OAuth window after hitting the login button for some computers