Everything, I post, is as far as my work, public domain.
Right now, I'm working on the Lieder-package. This contains the Liederheft-package and the Liederbuch-package. Lied = german for song. The Liederheft-package is based on the scrbook.cls and provides stuff for making small songbooks like you use in church for example. The Liederbuch-package provides environments and stuff to generate songbooks. From these songbooks there can be inserted entire, formatted songs into some document. In the final stage, this package will also include a lilypond template do generate notes for the songbook. You can use different songbooks simultaneously.