Java portals
eWeek has a head-to-head review of Apache Jetspeed-2 and JBoss Portal. The last time I was reviewing open source, standards-based Java portals (which was a little less than two years ago), neither of these was ready for prime time. At that time, the two main contenders (in my opinion) were Liferay and Exo. At the time, I selected Liferay for the project I was working on, because its security model and architecture was more compatible with my project.
It looks like Liferay and Exo are still going strong, but if I were evaluating Java portals again today, I’d probably take a good hard look at Jetspeed-2. It supports portlets written in other languages, which helps transition legacy systems into the portal framework, and it plays well with other Apache products most of us are already using.
One portal system I have not examined at all is Plone, although I keep hearing nice things about it. The next time I need to evaluate open source, standards based Java portals, I guess I will have to add that to the list, as well.