Skype
Skype allows free voice and video computer-to-computer calls, and calls to phone numbers for a fee. Video is only available for person-to-person calls, but multiple users can join a voice call. Skype can be used for free by educators in the classroom: http://www.educatorstechnology.com/2012/06/complete-guide-to-use-of-skyp...
The SSH Open Marketplace is maintained and will be further developed by three European Research Infrastructures - DARIAH, CLARIN and CESSDA - and their national partners. It was developed as part of the "Social Sciences and Humanities Open Cloud" SSHOC project, European Union's Horizon 2020 project call H2020-INFRAEOSC-04-2018, grant agreement #823782.
