it seems to get more and more popular to put together an extensions directory? 
you might want to read this
There is already an encyclopedic extensions directory available, which is here
App Inventor Extensions | Pura Vida Apps, which lists currently more than 625 extensions. I’m collecting links to available extensions already since the extension feature was introduced in App Inventor in 2016.
As you just said, you are listing currently 8 extensions…
Questions:
- How do you want to find links to extensions without copying the links from my site? And do you think, this would be morally and ethically correct? I don’t think so…
- Are you ready to keep up to date with your list and this not only for a few weeks or months but for years?
Taifun