Q: I enjoy interacting with students in f2f classroom by using clickers for example. How can I recreate this experience online?

A: It is challenging because the most powerful component of polling practice is a real-time feedback. In online classroom the polling still could be used to elicit information from students asynchronously to capture an overall mood of your virtual classroom. Look at some  tools that are available for free: 
TodaysMeet
Padlet
Poll Everywere
Polldaddy
Check the additional resources here.

Q: I need to create a meaningful interactive data visualization for the class project. How to choose the right tool? What technology is used to create interactive and dynamic data visualizations?

A: Look at the list offered by http://selection.datavisualization.ch/
Retrieved from Liz Dorland's scoop: A Carefully Selected List of Recommended Tools on Datavisualization.ch