Hello,

I worked on the BIP 171 and I created Cerise (github) that provides the following artifacts :

I made some proposal of evolutions here : https://github.com/bitcoin/bips/wiki/Comments:BIP-0171

I hope it helps and if you have any suggestion on how I could help more, let me know.
--
Stéphane Traumat
https://about.me/straumat