Pattern Ideas:
http://www.daltileproducts.com/tile_patterns.cfm

Dal Tile:
www.daltile.com

American Olean Tile:
www.americanolean.com

Crossville Tile:
www.crossvilleinc.com

Tile Calculator:
http://www.ceramic-tile.com/CTCalculator.cfm

Shaw Ceramic Flooring:
http://www.shawfloors.com/FloorChoices/Ceramics.asp