CB2 Aluminum Business Card Case
CB2 Business Card Case: Sleek, simple and inexpensive - why can't all accessories have these qualities? The Card Case holds up to 15 business cards, is lightweight and clips shut. Although made for cards, you can actually fit your license, credit card and a few bills. I tend to use card cases when I have to run a quick errand or if I'm going out dancing and don't feel like carrying a bag. Who wants to dance while holding a bag? If you are wearing jeans or shorts, just slip in your pocket and be on your way. Price: $3. More Info
Alice Park Slotted Card Holder: It does not get any more minimal than these card holders by Alice Park. Simple, sleek and functional. It can hold and conceal about ten cards and some cash. A great accessory for running a quick errand, or if you are walking around the city and want to travel light. Made of kidskin leather and comes in a wide variety of colors - turquoise, navy, lavender, green, red, orange, dk grey,olive, taupe. Card holder dimensions: : 4" x 3". Price $35. 
L'Agenda Moderne Card Case: I love how colorful and simply designed the leather card cases are by L'Agenda Moderne. Since these are small and slim, they are best used for a few credit cards or for your business cards. I always try to stuff more and more things in that I shouldn't, so using this would force me to minimize what I carry with me. A great stocking stuffer for the holidays. Card case dimensions: Size: 3" x 4". Price: $48. 
Acme Card Case: Although traditionally used for business cards, I think these card cases are great for a quick run out when you need to carry around your license and just a few credit cards. I admire the graphic art nature behind each case, which is just as fashionable of an alternative as a leather wallet by any high end designer. And for the price, you could literally start a collection of your own. I am bit of a weirdo and have displayed mine as artwork. Case dimensions: 2 1/4" x 3 3/4". Price: 29.