Skype

Skype is a proprietary telecommunications application operated by Skype Technologies, a division of Microsoft, best known for VoIP-based videotelephony, videoconferencing and voice calls.

Skype was created by Niklas Zennström, Janus Friis, and four Estonian developers and first released in August 2003.

Version History
The latest Windows desktop version is 8.94, while the UWP version is 15.93.