Dear Users, I want to show you our project: Denemo.

Short Info:
Purpose: Music-Composer Tool, Notation-Software, Lilypond-Fronted.
Website: Denemo - Open Source Music Notation Editor
System: Windows, Linux, OSX, probably others, too.
Price: Free
License: GPL
Languages: C, Scheme for scripting, generates Lilypond.
Contact: Mailing-list, irc #denemo in freenode,
Screenshot: Click to open. Top right is Epdfview, rest is Denemo itself. Windowmanager is WMII.

GNU Denemo is a free, GPL, open source music notation editor for Linux, MacOS and Windows that lets you rapidly enter notation for typesetting via the LilyPond music engraver. You can compose, transcribe, arrange, listen to the music and much more.

We are a small team of 3 people, 2 of them are real programmers.

Frontend and Backend are not divided, but this is some greater goal we have.
The program itself is stable and ready for daily use, but of course there is much to do.

Maybe you can help us? You don't have to be a musician. Contact me through one of the above mentioned options.