open source CMSs

[Faisal Khan]

Hi Guys,

I am not sure if this question is in the appropriate forum, I am embarking upon a task to evaluate some CMSs in PHP and Java. I can do with some help in identifying some *good* open source java based CMSs.

I am particular on a few things in addition to all the normal CMS features:

- flexible categorisaion, ideally no limit (ExpressEngine has this (PHP))
- one CMS hosting multiple sites, such that all data is in one database, uploading is in one place and then end user interface is deployed for each site (apparently Typo3 (PHP based) can do this)
- would like a very good cross reference ability, linking one article to other relevant articles (within the site and across set of sites)

Any help will be appreciated.

Thanks

Faisal