MuseScore is a free, open-source music notation and composition application built using Qt 5, with access to thousands of music sheets, an integrated sequencer to allow for immediate playback and many more features. Version 2.0 was released today, March 25, and it represents a milestone release in the development of MuseScore, shipping with an impressive number of new features, varying from major UI changes to musical notation features like tablature support, or improved playback support.