O&D lite is a free educational application by Essam Salah. The application is used as an accompaniment for playing the oud and other Arabic musical instruments. It specializes on playing Arabic rhythm accurately and easily. Users are provided with high-quality and high-spirited rhythms or loops. They can control the intensity of the rhythms if it runs too fast for them to follow. The application is also available for usage along with other musical instruments. There is also a violin rhythm option in the application. Users can hone their skills when playing musical instruments as they practice with this application playing rhythms.