NEW on the list. 

Plickers is a tool that lets teachers collect real-time formative assessment data without the need for student devices

Website: plickers.com
Cost: Free
Availability: Download app

Top 100 Tools for Personal & Professional Learning 2018: –
Top 100 Tools for Workplace Learning 2018: –
Top 100 Tools for Education 2018: 63

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