About 4th: Do you know http://speaking.io/ http://speaking.io/ or http://simplebits.com/notebook/2010/12/13/on-speaking/ http://simplebits.com/notebook/2010/12/

About 4th: Do you know http://speaking.io/ http://speaking.io/ or http://simplebits.com/notebook/2010/12/13/on-speaking/ http://simplebits.com/notebook/2010/12/13/on-speaking/? And maybe check out https://www.entheos.com/Speak-Like-a-Pro/entheos https://www.entheos.com/Speak-Like-a-Pro/entheos.