Using JointsWP, you can easily display your posts in a grid format. The Grid Archive uses Foundation’s Equalizer to ensure all posts are the same height, which keeps the grid intact.
In index.php or archive.php find:
<?php get_template_part( 'parts/loop', 'archive' ); ?>
Change to:
<?php get_template_part( 'parts/loop', 'archive-grid' ); ?>
Grid Archive Options
It is very easy to adjust the number of columns in the grid. Simply adjust the $grid_columns variable in parts/loop-archive-grid.php to the amount of columns you want to display. Then adjust the grid to your desired settings on line #14.