Twitter's Bootstrap 2.0 tied up
Bootstrap 2's design gives developers a new 12-column grid system to lay out their content. The new grid is described as responsive, and allows projects to "virtually work out of the box" on smartphones, tablets and other newer screen form factors. The content within the grid layout can include the new table styles with improved compatibility with other tools and new form styles with "smarter defaults". There are also new "smarter" navigation components, buttons, button groups and button drop downs, and simpler alert messages.
Bootstrap 2 is available from the project's github repository or can be downloaded in its entirety. Users upgrading from Bootstrap 1.4 should refer to the upgrading page for details of changes. Bootstrap has been developed by Twitter's Mark Otto and Jacob Thornton and is licensed under Apache 2.0 with documentation under CC BY 3.0.