Trillian is a fully featured, stand-alone, skinnable chat client that supports AIM, ICQ, MSN, Yahoo Messenger, and IRC. It provides capabilities not possible with original network clients, while supporting standard features such as audio chat, file transfers, group chats, chat rooms, buddy icons, multiple simultaneous connections to the same network, server-side contact importing, typing notification, direct connection (AIM), proxy support, encrypted messaging (AIM/ICQ), SMS support, and privacy settings.
Программа способна выполнять функции ICQ, AIM, MSN Messenger, IRC-клиента и Yahoo! Messenger — можно будет обмениваться сообщениями сразу во всех перечисленных сетях без установки самих программ ICQ, AIM и т.д. Доступны такие возможности, как поддержка множественных ICQ/AIM одновременных сессий, мультисерверные соединения, настраиваемые звуковые эффекты, расшаривание ресурсов, поддержка скинов и многое другое.

Trillian provides unique functionality such as contact message history, a powerful skinning language, tabbed messaging, global status changes (set all networks away at once), Instant Lookup (automatic Wikipedia integration), contact alerts, an advanced automation system to trigger events based on anything happening in the client, docking, hundreds of emoticons, emotisounds, shell extensions for file transfers, and systray notifications.

Features:
Improved speed
Bug fixes
Biography (AIM Profiles)
Universal Plug-and-Play (UPnP)
On the fly link/emoticons
Font face support in IMs
Undo in edit area
Orphaned contacts (no more merging)
Many IRC enhancements
Better Yahoo file transfers
Identities (per section Biography/Icons)

What's new?
* Info Card
Highlight any list entry with your mouse cursor and extra information will appear in a convenient info card. Easily see status messages or an expanded news feed with a quick mouse movement.
* Change Your Status Message
Type messages directly into the contact list to immediately send across all available services.
* Match your Music
Have your status message follow your music from iTunes, Windows Media Player or Winamp.
* Change your Icon and Name Easily
Simply click your name and type to change your display name across all IM services. Drag a picture file into your avatar area to change it as well.
* Instant Diagnosis
When an individual connection is disconnected, Trillian will now notify you while it attempts to re-connect in the background.
* Save and Retrieve Status Messages
Trillian now supports visible grouping of status messages, enhanced support for variables, font styles and emoticons, and as always, full control over how a given status message applies itself across connections.