This is the backend-project for a distributed application that is used for organization and administration of music-bands/associations/societies.
Administration of appointments (gigs) or meetings for members and/or groups of members. Fully working calendar-subscriptions.
Administration of members, addresses and personal data, groups, roles & permissions, relations.
Organization of Music-Pieces, Sets of Music-Pieces, Equipment and Instruments.
Administration of arbitrary many cash-books for each group of members.
see mkjAPP
This project was used to be my "learn-web-developement-sandbox" and still it is, but currently this app is also used in real-life by several bands.