The best things in life are free, especially when it comes to NYC's summer concerts. This May through August, you can hear live music of all kinds across the City without spending a dime. Whether it's punk on Staten Island, indie rock on the Manhattan waterfront, a classy night outdoors with the Metropolitan Opera or a diverse lineup of jazz and world music at SummerStage and Celebrate Brooklyn!, New York City's gratis alfresco performances are sure to please music lovers of all tastes. Below, find some of the shows we're most excited about and a list of warm-weather concert series and festivals. Be sure to check back frequently as we continue to update our listings. Enjoy, and rock on!