Ten Open Source Solutions Your Enterprise Should Be Using

I knew this article from iText forum .
and just list the Ten Open Source Solutions here, you can read the origin article.

• Web Services

XFire
Axis2

• SOA

ActiveMQ
ServiceMix

• Integration

POI
iText

• Frameworks

Hibernate
Spring

• Libraries

JUnit
Jakarta Commons

btw, I do not know java very well, but I do not know why the author does not list ant and many other great open source projects?