You could have downloaded Leitourgia 1.4.1 for Mac from our application library for free. The application lies within Lifestyle Tools, more precisely Religion & Esoterics. The actual developer of this free software for Mac is Peace Lutheran Church.
From the developer:
Leitourgia helps you plan your worship far in advance and always know where that planning can be accessed. You will find the application very easy to use, since its one main window is easy to understand. You can have easy access to all the elements of a particular worship service.
You may want to check out more Mac applications, such as TimePassages Folder, Opera Bible or Ya Allah All Duas, which might be similar to Leitourgia.