- Bootstrap uses flexible Grids.
- Bootstrap includes a responsive, mobile first fluid grid system that appropriately scales up to 12 columns as the device or viewport size increases. It includes predefined classes for easy layout options.
- RWD Frameworks
- BootStrap and Foundation are two of the top frameworks.
- Learn more about RWD
- Where it all began! Also check out Mobile First by Luke Wroblewski and Responsive Web Design by Ethan Marcotte.
- Grid Layout
- Constructing the grid layout step by step.