Skype voip
I used skype for making phone calls for the first time this week and was very impressed by the quality of calls as it is very cheap to call and the voice quality is great and I did not notice any lag either. I talked to a friend in toronto for 55 mins and it costed me less then $1.5 for that call and if I would have used my phone for this call the cost would have been about $11-12.
VOIP can be a great money saver for business which need to call thier clients abroad and especially north america where voip calls are cheaper then the rest of the world.