I started a conversion of 10 Bootstrap themes to XOOPS, but I’ll need help from some of our XOOPS Design Experts! 
I also played a little bit with Materialize, so maybe somebody can continue with it:
https://github.com/mambax7/theme-xmaterialize
IMPORTANT NOTE: This was only a “Proof of Concept” study about how quickly could we convert Bootstrap Themes to XOOPS. These themes are in ALPHA release, and will need some help from our XOOPS Designers before they become usable.
Therefore please DO NOT use them on production sites. However, please fork them, improve them, and help us with development.
Anyar
XOOPS Web Application System
