Starbase

This is a simple base theme consisting only of template files. It's less classy than Classy but more classy than Stable ;)

For example, classes in the node template are:

{%
  set classes = [
    'node',
    node.bundle|clean_class,
    view_mode ? view_mode|clean_class,
  ]
%}

Which results in something like this:

<article class="node article teaser">

As an option, you can use Starbase with theme libraries from Stardust to get a good starting point for a new theme. Starbase provides the templates, Stardust provides the libraries. They can be used together or separately according to your preferences.