Awesome
<img src="https://raw.githubusercontent.com/MonettelliUIKIT/monettelliuikit.github.io/master/assets/images/MonettelliUIKIT_Logo_2.png" width="350px" />MonettelliUIKIT
A multiproject template for building iOS and Android applications in Xamarin.Forms for productivity and maintenance thanks to the "Clean UI Style Architecture".
For more information click <a href="https://monettelliuikit.github.io" target="_blank">HERE</a>.
Is the extension free?
Of course, it was made for the Xamarin community.
It is worth mentioning that, being open source, you can improve the features by sending an Issue or a pull request to <a href="https://github.com/MonettelliUIKIT/MonettelliUIKIT" target="_blank">MonettelliUIKIT</a>.
Credits
Many thanks to all those who <a href="https://monettelliuikit.github.io/docs/credits" target="_blank">collaborated</a> directly and indirectly to this great project.