Trillian has been around for quite a long time. This isn't a hip teen's chat client - it's their father's. No seriously, many of the people who used this IM client back when it was fresh are old enough to have children now. Trillian came to fame at a time when consolidating chat clients into one piece of software was almost a necessity on consumer desktops, as running several of the official messengers at once was such a memory hog.
Google Hangouts hasn't had any major changes since its debut earlier this summer, but the latest version of the app adds some interesting tweaks. Google's new, annoying habit of staged rollouts means that a lot of people don't' have access to the updated app, even though it started becoming available on the 23rd. The indefatigable Ron Amadeo had a look inside, and found it to be a housecleaning update, with a lot of tightened code and only a few new features.
Chat clients limited to one-on-one conversation are going the way of the dodo. We've got numerous options for group messaging including: Facebook Messenger, WhatsApp, Google+ Messenger, Live Messenger, and we're even pretty sure Babel (or whatever it will be called) will join the list. Today, popular cross-platform chat app, Tango, steps up to match its competitors.
The additions to the interface are very straightforward. You can pick multiple people from your contact list to start a conversation and at any time add new people or leave the chat altogether from the participants screen.
Finally! Since the dawn of floating apps (which was like, what, three months ago?) this is the one that I've hoped for: a chat client! Brought to us by the Tablified dev team, LilyPad HD finally makes it possible to rid yourself of the full-screen chat client on your tablet for something far more practical.
Like other floating apps, LilyPad offers basic features needed for an always-on-top app, like quick-hide mode, resizable windows, and even tabs for chatting with multiple people without having a slew of small windows taking over the entire screen.