An updated version of bibtexbrowser http://www.monperrus.net/martin/bibtexbrowser/ which is HTML5 and responsive. Based on Bootstrap.
Boostrap 3.3.4 http://getbootstrap.com/ must be installed in your working directory or be accesible from there.
I recommend to set bibtexbrowser-bs.local.php to:
@define('BIBTEXBROWSER_DEFAULT_FRAME','all');
@define('BIBTEXBROWSER_BIB_IN_NEW_WINDOW',true);