Kevin MacLeod ( mə-KLOWD; born September 28, 1972) is an American composer and musician. MacLeod has composed over 2,000 pieces of royalty-free library music and made them available under a Creative Commons copyright license. His licensing options allow anyone to use his music for free as long as he receives attribution (credit), which has led to his music being used in thousands of films. His music has also been used in some commercial video games such as Kerbal Space Program.