Website: http://www.skype.com

Short description: Skype is a free VoIP and video conferencing service for Pc, Mac, Linux, Windows Mobile and Os X Mobile to make one-to-one video calls. You can text-chat (also in group mode), have audio / video calls, transfer files, and more. Mac version also allows to share your screen. Video calls are limited to two people, but there are many third-party software that let you add more people, and also record your conferencing sessions. Embeddable widget available. Pay As You Go pro account allows you to buy $10 of Skype credit to call landline and mobile phones, which have to be used within 180 days.

Costs: Free

Experiences:

Metadata:

• VBTNumberOfParticipants=2 (up to nine people in beta)