App Inventor Website Status

#1

After downloading some extensions from this site, I find those extensions are identical. What is the status of the site? Still active?

I am a member of IoT App Inventor team. See the link.

Is there some source code for those extensions available for public?

#2

The extensions for different robots are different, each expansion only supports the the action and sensors which supported by corresponding robot, and so far they can be used normally. Connection and other operations experience are consistent.

#3