Wall Coverings: Wall coverings used to be known as wall paper, but today they are so much more. You can still buy the paper kind at the hardware store. Though, fabric wall covering is much more elegant, like in the picture from Schumacher (http://www.fschumacher.com/products/wallcoverings/default.aspx). It would be used if you wanted a detailed pattern or as an accent wall with lots of detail.
Tile and stone: Tile is most commonly used in bathrooms around tubs and in showers. Another popular place to use tile on walls is the backsplash in the kitchen. Tile can make a great accent to any room not just the kitchen or bathroom. Tile comes in many shapes, colors, textures, and designs such as the above picture from Pental (http://www.pentalonline.com/ceramic/mercury-mosaics/).Glass and resin: Lightblocks, as pictured above (http://www.pentalonline.com/ceramic/mercury-mosaics/), are one of my favorite forms of wall finishes. When lit from the front they reflect the light making the room brighter. When lit from the back they emit a warm glow that adds a cozy element to the room. It also gives a modern, clean, and crisp look to any space.