I am using this on one of my XOOPS sites, and thought I would share the link. It integrated perfectly with my user database and my members love it. It's a web-based free instant messenger. Just read the instructions. It took me about 15 minutes to get it going and customized: http://www.php121.com/

If you get that, you may also want:
http://www.php121.com/imbuddylist/IM_Buddy_List_v20_Beta9c_forphp121_v20.rar

That one gives the messenger buddy lists, profiles, away messages, etc.

I noticed Wizanda mentioned this a long time ago.... but there were many errors with the script then. I am using it and not seeing any of them in the 2.1 version. I see there is even a 2.2 version now, but they require a 15 dollar donation. I plan on upgrading to that one soon also.

cant see the demo of this IM but do you think its better than alitalk?
https://xoops.org/modules/newbb/viewtopic.php?viewmode=flat&topic_id=55623&forum=30

I like that one, too. I am going to use one on one site and one on another... I have 2 of my non-profit organization sites with many of the same users. Then I will poll them later to see which they like the best.