Equal CSS Tiles and Columns

 Two horizontal tiles, spaced equally:

     <div class="tile-halves">
	<div class="tile">First Tile</div>
	<div class="tile">Second Tile</div>
     </div>

 Three horizontal tiles, spaced equally:

     <div class="tile-thirds">
	<div class="tile">First Tile</div>
	<div class="tile">Second Tile</div>
	<div class="tile">Third Tile</div>
     </div>

 Four horizontal tiles, spaced equally:

     <div class="tile-quarters">
	<div class="tile">First Tile</div>
	<div class="tile">Second Tile</div>
	<div class="tile">Third Tile</div>
	<div class="tile">Fourth Tile</div>
     </div>