I’ve been a fan of Skype for a few years now. It’s been around long enough that I shouldn’t have to explain what it is. If you do want to know more check out the Skype website.
I downloaded their version 4 recently (for PC), and its claim of improved audio was on the mark, very impressive. Its great for the face to face video chat, a thing of science fiction fantasy only a decade ago or having a group of you engage in a conference discussion.
In todays NZ Herald the Yellow Pages have taken a step forward by introducing Skype to their listings, and as part of the introduction making it free to connect to a landline. Internet to internet connections via Skype are free anyway but there is a 4cent per minute charge normally for Skype to landline calls.