Spider Solitaire is a very popular column based card game like Spiderette or Scorpion Solitaire. The game is played with 2 decks of cards, and the suits don't matter. Many online and computer versions of Spider Solitaire only use a single suit to avoid confusion. If you play with a real deck of cards you would use all the cards in the 2 decks.
Here's a quick rundown of how you play. Your goal to create columns of cards from King to Ace without worrying about suit. Once you create a column of cards that is from King to Ace, it gets removed from the game. You can add another card to each column by clicking on the deck. You can either move the top card of any column, or any fully packed series of cards. A fully packed series of cards is one that is in order.