Skype is a free Voip (voice over internet protocol) service with a website at: http://www.skype.com.
Fairly easy to use with a small learning curve, Skype can be downloaded and used most computers. To get Skype and use it, turn on your computer and follow these steps:
Keep an eye out for upgrades that allow up to 10 callers per conference, plus option paid features with Vapps service to coordinate advanced usage features with Skype. For now, you sure can’t beat the free service, when it costs quite a bit to conference call with landline phones. Also, realize you direct dial and hook up everyone yourself, so there is no need for scheduling in advance and getting operator assistance. Plus, you have unlimited time to talk (most conferences require cut off after 4 hours) and don’t need any number or letter codes to enter to access the conferencing. Have fun conferencing!
Special Thanks: http://www.freevoiptips.com/