Man, pidgin was the fucking best back in the late 00s - mid 10s. Everyone was spread across a handful of different chat programs and systems and you could use one program for all of them.

I think I had AIM, MSN (Windows Live Messenger? I remember they rebranded it like 4 times), Yahoo Messenger, Skype, and Facebook Messenger all set up. Iirc I even had multiple AIM accounts signed in on it at one point.

Unfortunately smart phones coralled everyone into whichever had support on them, which I remember to be Facebook Messenger. Then walled garden shenanigans closed down shit further.