NOT ON THE LIST IN 2018

Periscope is Twitter’s live-streaming video app. It allows you to watch and broadcast live video from all across the globe.

Website: periscope.tv
Cost: Free.
Availability: Download app

Past Overall Rankings
2017: –   2016: 165   2015: –   2014: –   2013: –   2012: –   2011: –   2010: –   2009: –   2008: –   2007: –

Comments from some of those who selected Periscope as one of their Top 10 Tools

“listen to live talks of thought leaders” Saif Altalib, 2015

“for free live casting” Kandy Woodfield, 2015