While this is not yet an official Clazzes.org project, it might be useful for others anyway:

Server applications can benefit a lot from using LibreOffice's capabilities to read and write several office file formats (like doc, docx, odt, ods, xls, xlsx), and PDF.

We now made it easer to run a libre office instance as operating system service by introducing a wrapper: LibO-Server.

Debian packages are available from deb.clazzes.org (Category libo), Windows packages are available at download.clazzes.org/libo-server/.