Prebuilt Documentation and packages are available from: http://lilypond.org LilyPond development is hosted at: http://savannah.gnu.org/projects/lilypond Here is a simple explanation of the directory layout for LilyPond's source files. . Toplevel READMEs, ChangeLog, build bootstrapping, patches for third party programs Documentation/ bibliography/ .bib files with references to books and articles misc Old announcements, ChangeLogs and NEWS pictures/ The logo topdocs/ Sources for the toplevel READMEs (README.txt, INSTALL.txt, NEWS.txt etc.) user/ User manuals buildscripts/ Scripts for the build process cygwin/ Cygwin (Windows) package support debian/ Debian package support elisp/ Emacs LilyPond mode and syntax coloring flower/ A simple c++ library include/ input/ Music input examples bugs/ Buggy or problematic notation mutopia/ Real music, more at www.mutopiaproject.org no-notation/ Examples that do not produce output regression/ Testing of features, one test per file test/ Tips and tricks tutorial/ Examples from the tutorial lily/ C++ sources for LilyPond (lilypond-bin) include/ ly/ System music include files make/ Specific make subroutines and packaging for Red Hat-like distributions (.spec files) mf/ MetaFont sources for the feta font po/ Translations ps/ PostScript library files python/ Python modules, MIDI module scm/ Scheme sources for LilyPond and subroutine files scripts/ End-user scripts stepmake/ Generic make subroutine files tex/ TeX library files vim/ Vi(M) LilyPond mode and syntax coloring