From Sincrosoft SpA:
Opus is a professional notation software, intuitive and equipped with an incredible array of functions, adapted to the needs of every type of user. Ease of use, power, short learning curve, new technology, localization: these are the main reasons why musicians are more and more choosing Opus. You cannot imagine how can be easy to read, edit and write a digital score with Opus. Opus is created to operate using today's technology.