Founded 10 years ago, in 2003, Skype is headquartered in Luxembourg and is now a division of Microsoft Corp. (NASDAQ: MSFT). Skype is one of the world’s most popular voice-over-Internet-protocols (VoIP) technologies for free internet video calling, video, messaging and sharing. Skype users can call anyone else on Skype for free, anywhere in the world. Skype calls mobiles and landlines worldwide at low rates. A group of people can get  together on one call—users can add up to 25 people. Users can also Add Skype Buttons to their website or blog and with one click anyone can call or IM.