Meeting helper από Mahmudul Alam

Github
You can use this to who when attended the meeting and when left. You can also see when a user turned his microphone or camera off. This extension will collect information during meeting and will make a text file and HTML graph report. You can use the graph directly for good overview of the participants. Also, you can use the Text file for further processing. All activities of this extension happens on your browser and never make any HTTP request nor save permanently.

Features
1. See a list of participants whose microphone is off.
2. See a list of participants whose video is off.
3. See absent participants list.
4. See extra participants list.
5. See how much time a participants was active.
6. A text file with realtime data when extension stopped.
7. A HTML file with realtime graph data when extension stopped

Meaning of color and number in HTML and Text file
0 and red color stand for absent
1 and black color stand for present but microphone and video was off
3 and yellow stand for present but video was off
4 and blue color stand for present but microphone was off
6 and green color stand for present and microphone and video was on.