Not to take anything away from a really nice contribution by Twitter's team, but know that stuff like this in tens of different variations are available for tens of dollars at sites like ThemeForest.<p>A typical "admin" theme has some variant of the 960 grid, nice forms and buttons, drop-down navs, tabs, and accordions, and multiple layouts.<p>The templates won't be as well documented as this one, and they'll be more brittle and probably more poorly coded... but they'll only take an hour or two of additional work to (say) Hamlize and bring into your Rails project. They'll look more distinctive than Bootstrap. They'll have better browser compatibility.<p>Unless you're crazy enough to be selling web apps to web developers, no customer of yours is ever going to know or care which of these things you started out with.<p>Or, use Bootstrap; it's really nice. I'm just saying you have lots of good options.