In addition to his Shoelace theme, another bootstrap-based responsive theme [latest release here: https://moodle.org/plugins/pluginversion.php?id=5626], Gareth Barnard recently released a new customizable theme called “Shoehorn”. A major difference for this theme is that it’s based on Bootstrap 3.0.
The whimsical theme features loads of customization options for login pages, front pages, footer, etc., in addition to a novel feature called the image bank (which lets you store images or use anywhere else on the site). You can check out a full theme feature walk through in this video embedded below [direct video link: https://www.youtube.com/watch?v=HS4hx6fRX9o]
You can get a copy of the beta release (not for production sites) at https://moodle.org/mod/forum/discuss.php?d=257579