Singularity lets you toss out your old, stodgy grid system and create a system of columns and gutters that actually works with your content, allowing different layouts at different breakpoints, a visual order that isn’t tied to your source order, and no more terrible class names. Singularity is a Sass plugin which can be used on any Sass/Compass project and frees you from needing to use a grid-specific theme for your Drupal site. This technology is CMS/theme-agnostic and can be used successfully with many Drupal base themes or even on non-Drupal projects.