Softphone: Online, chating and voice

Hi Forum;

As I know that there was a softphone which give has a possibility to have something like messanger (knowing who is online) and sending texts to each other, in addition to do voice.

As I know it is IAX, and it is for Asterisk, but I do not see it any more and does not know where it is?

Any help or advise?
Regards
Bilal