Universal Web Cam Program?

Morning.

My replacement laptop has a build in web cam thingy. Figured I might as well use it with some people, just for fun, but they all use their own programs. My uncle uses Windows Live. A cousin uses Skype. I think another uses AIM (can not verify that in my tired state).

So, based on any experiences out there, is there a program (FREEBIE) that I can use that will communicate with them no matter what client they use?

My webcam experience is zilch. I did a quick Google search before writing this and, well, you can imagine what results I got!!!!

Thanks for any info.