iStock("What to Do with Gift Card You Don't Want" \\ Gift cards \\ Photo: iStock)

Last January I wrote about plasticjungle.com and how the site can convert unwanted gift cards into either cash, an Amazon gift card, or a donation to charity for the value of the card. Since then, other sites that do the same or similar things with gift cards have come to my attention.

Some of the more interesting ones are:

1. cardpool.com - On this one you can set up a Wishlist of your favorite merchants and you'll get a notification when it has gift cards that you can get in exchange for your unwanted ones.

2. giftcardrescue.com

3. cardwoo.com

Just as with plasticjungle.com, each of these sites offers you a percentage of the value of the card. So be sure to shop around! Put the vendor and gift card amount into each site and see how much each offers you so that you're sure to get the best deal. And of course if you want to get the full value of your card without going through a third party, you can always try to sell your unwanted cards on craigslist or see if anyone you know on Facebook wants to take them off your hands!