This program is still in beta stage.
MusicXML is a file format developed by Recordare that can be used to exchange files between music notation software like Sibelius, Finale or Capella.
Zong! Viewer allows to display, print and play back MusicXML documents. When using the applet, the scores can be displayed within any web browser.
This program runs on Linux, Windows, MacOS and Solaris. Java 6 or higher is required.
This program is free software, released under the GNU General Public License (GPL).
© 2006-2010 by Xenoage Software
MusicXML format © by Recordare LLC, http://www.recordare.com
GNU/Linux (Ubuntu 9.04):

You can try out the applet.
Thanks to SourceForge.net for hosting the files. For the source code, please check out the Git repository.
If you are interested in the project, please follow our development blog.
A public Git repository is available:
git://zong.git.sourceforge.net/gitroot/zong/zong (read-only) (browse)
- On Mac OS X the display of the images or the score may be broken. We are working to fix this problem.
Please contact us if you experience any problems with the Zong! Viewer.