Buttons
white
red
pink
purple
deep-purple
indigo
blue
light-blue
cyan
teal
green
light-green
lime
yellow
amber
orange
deep-orange
brown
grey
blue-grey
Material-design-like shadows
card depth-0
card depth-1
card depth-2
card depth-3
card depth-4
card depth-5
12-column grid system
col-1
red-bg
col-1
pink-bg
col-1
purple-bg
col-1
deep-purple-bg
col-1
indigo-bg
col-1
indigo-bg
col-1
blue-bg
col-1
light-blue-bg
col-1
cyan-bg
col-1
teal-bg
col-1
green-bg
col-1
light-green-bg
col-2
lime-bg
col-3
yellow-bg
col-4
amber-bg
col-3
orange-bg
col-1
deep-orange-bg
col-3
brown-bg
col-1
grey-bg
col-2
blue-grey-bg
It's also pretty responsive (resize window to try it out).
col-sm-6
red-bg
col-sm-6
yellow-bg
col-md-6
lime-bg
col-md-6
grey-bg
col-lg-6
blue-grey-bg
col-lg-6
cyan-bg
col-xl-6
teal-bg
col-xl-6
purple-bg