As indicated way back in my ‘Contact Information’ entry, I use several IM client networks. To make it easier on myself (and my poor computers), it’s usually easier to get an integrated client that connect to many services within one program.
My favorites:
For an even easier way to connect without software installations and to bypass many corporate proxy’s and/or firewalls is to use a web client.
My favorite (as I’m not aware of any others that are still online):
TTYL!