Several comments mention Skeleton as possible alternative to Milligram.  Unfortunately, as pointed out, Skeleton appears to be dead, i.e., no project activity for a year.<p>I&#x27;ve also used Skeleton in several projects though it required customization of UI element sizes, max grid width, etc.  On the whole Skeleton worked well enough and sufficiently lightweight.<p>For all Skeleton users, the project was forked a few months ago and now lives on as skeletonframework, available here: <a href="https:&#x2F;&#x2F;github.com&#x2F;skeletonframework&#x2F;skeletonframework" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;skeletonframework&#x2F;skeletonframework</a>