Every spring, I can't wait for the start of March Madness. This popular U.S. college basketball tournament brings out the competitiveness of me and my friends as we fill out brackets with our predictions for winning teams. Starting in 2006, we brought the tradition to Facebook by using the first brackets application to organize and share all of our picks online. Since then, the number of ways to connect over the 63-game NCAA basketball tournament have only increased.

This year, you can use a number of Platform applications to compete with your friends' predictions. On Selection Sunday, March 15, find out which teams will face off in their quest to be the champion, and check out any of the following apps to get started:

• CBSSports.com Brackets by CBS Sports
• 2009 Bracket Challenge by Citizen Sports
• 2009 Bracket Challenge by Watercooler