Stable UC:
=======
Apache Ant documentation (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/stable/extra/org-apache-tools-ant-module-docs.nbm)
PHP Support (still Alfa quality)
OpenOffice.org Integration (NBMs not available yet, works with 5.* only)
JDBC Rowset (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/stable/extra/org-netbeans-modules-visualweb-libs-rowset.nbm)
Log Management (http://www.netbeans.org/nonav/issues/showattachment.cgi/49720/org-netbeans-modules-logmanagement.nbm)
Nokia Deployment (http://www.netbeans.org/download/nbms/551/stable/Features/org-netbeans-modules-deployment-nokia.nbm)
Task List (NBMs not available yet, works with 5.* only)

Beta UC:
======
GlassFish v3 (NBMs not available yet)
REST Tooling (2 NBMs:
http://deadlock.netbeans.org/hudson/job/javadoc-nbms/lastSuccessfulBuild/artifact/nbbuild/nbms/extra/org-netbeans-modules-websvc-rest.nbm
http://deadlock.netbeans.org/hudson/job/javadoc-nbms/lastSuccessfulBuild/artifact/nbbuild/nbms/extra/org-netbeans-modules-websvc-restlib.nbm
)
WebSphere 6 (http://www.netbeans.org/download/nbms/dev/main/1.23/org-netbeans-modules-j2ee-websphere6.nbm)
GWT4NB (https://gwt4nb.dev.java.net/files/documents/6705/58365/org-netbeans-modules-gwt4nb.nbm)
Jellytools (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-jellytools.nbm)
Jemmy Module (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-jemmy-idemodule.nbm)
Jemmy Support (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-jemmysupport.nbm)
XTest Samples (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-xtest-examples.nbm)
XTest Module (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-xtest.nbm)
NB JUnit (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-nbjunit.nbm)
NB JUnit IDE Integration (http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-nbjunit-ide.nbm)
Portal Pack (4 NBMs:
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-portals-sunps7.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-portalpack-portlets-genericportlets.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-portalpack-servers-opensourcepc.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-portalpack-servers-base_psframework.nbm
)
Extra Ruby (4 NBMs:
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-ruby-themes.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-ruby-extrahints.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-ruby-hints.nbm
http://dlc.sun.com/netbeans/updates/6.0/uc/beta2/beta/modules/org-netbeans-modules-ruby-rspec.nbm
)