Trillian

Trillian Astra is a nice IM program. Offering support to all major IM services like AIM, WLM, Yahoo, ICQ and GTalk, plus Twitter and Facebook chat, it's a good software to stay connected with friends and business partners.
It offers some interesting unique features, like the instant lookup on Wikipedia by hovering words in text, quick switch of font styles for important messages and draw mode (fun thing I really missed since I gave up on WLM two years ago). The history log is just fantastic, offering way more options than I could ask for, I really felt in love with it. On top of all that, I found Trillian Astra to be very light on system resources, using less memory than Pidgin or Digsby.
Despite all this nice features, I wouldn't recommend this program to anyone. Its new interface (named Cordonata) is hideous and the old interface isn't functional at all. Both of them are ugly and feel like it wasn't well-thought. I couldn't figure out how to turn off the buzzer, too - an annoying WLM feature abused by some people. The file transfer have bugs (none of my sent files showed as really sent, always appearing stuck at some random percentage - my contacts were receiving the files ok, but I could never know). The way Trillian alerts for new tweets is just ridiculous, using tiny notification boxes that whether slows your computer down as hell (when receiving more than 5 at the same time) or fails to notify you from all updates. It’s hard to find your way to retweet and follow links, too. The interface isn’t intuitive at all.
Weighting down the pros and cons, though it’s a good program, I can’t see myself using it any longer. My guess is that this is a program designed with Windows Live Messenger users in mind, and this ones will be totally satisfied with Trillian. For the ones who uses Pidgin or Digsby, Trillian will feel like a step backwards.

Suggest using Digsby which doesnt charge you for the extra features that Trillian does.

Converted from MSN and I have to say it's quite nice. Has some great features.

The most awesome multi-protocol IM Client i've ever used.Trillian all the way!!

I'm using the free version. It's a bit bloated but at least the advertisements (at the top of many windows are text based and very unobrtusive).

I've used Trillian PRO for years and won't be paying to upgrade.. but I do enjoy this newest free version (even if it is a bit slower due to eye candy overload).

an all in one IM & Social network clint.

I think they've overdone it with the fancy interface in Astra, but since you can switch back to the previous interface it's all good.

Using the paid version of Trillian Astra. Seems decent. Has some work needed but really like where this could be going. Worth the money thus far for the most part. Once some of the issues are worked out will be even better.

Trillian Astra - Best IM software I've ever used. It allows me to connect to ALL of my IM/Communication services (AIM, MSN, Yahoo, ICQ, Google, IRC, Twitter) it a very friendly way. I LOVE the fact that it lets me group together contacts in a meta-contact as I have many friends that use multiple IM services as well. The new "astra" IM service is absolutely great! The best thing of all is that I am able to copy/paste images to IM windows and my contacts can see them right away. This is a truly AWESOME feature as I help many contacts on my IM list with computer problems and it is very helpful to be able to easily copy/paste screen-shots telling them what to do. Lastly, I ALSO love the fact that I can use the same account on any computer and because the contacts list/connections are stored on the trillian server, the information travels with me. 5/5 all around!

Been using it for years, it's so good. Just gotta fix a couple of bugs now, and then Astra will be even greater.

yes

Great all-in-one messenger! Trillian Astra is so great.
Twitter, Facebook, and so many IM's services all in it!
And still low on resources. And the UI is very sexy.

Multiprotocol, easy to use, simple. Now I switched to Astra and I thing I will stay with Astra. King is dead, long live the King.

I used to use this program until gaim became pidgin and rules the IM protocol universe.

I've been a user for years but do not like where they are taking the product. Astra has been in development for years but now they feel justified in charging for a beta.

That coupled with the sudden reduction in features in the beta in an attempt to get one to pay leaves a bad taste.