Linux
http://www.linux.org/
FreeBSD
http://www.freebsd.org/
PostgreSQL
http://www.postgresql.org/
Mysql
http://www.mysql.org/
SAP DB
http://www.sapdb.org/
Hypersonic / HSQL
http://hsqldb.sourceforge.net/
McKoi
Http://mckoi.com/database/
Xindice
http://xml.apache.org/xindice/
OJB
http://db.apache.org/ojb/
Hibernate
http://www.hibernate.org/
CASTOR
http://castor.exolab.org/
Torque
http://db.apache.org/torque/
JORM
http://mm.objectweb.org/
XMLBeans
http://xml.apache.org/xmlbeans/
JIBX
http://jibx.sourceforge.net/
CASTOR
http://castor.exolab.org/
JAXB Reference Implementation
http://java.sun.com/xml/jaxb/
JAXME
http://ws.apache.org/jaxme/
Tomcat
Http://jakarta.apache.org/tomcat/
Jetty
http://jetty.mortbay.org/jetty/
JBoss
http://www.jboss.org/
Apache Geronimo
http://incubator.apache.org/projects/geronimo.html
Jonas
http://jonas.Objectweb.org/
Openejb
http://opnejb.sourceforge.net/
Openjms
http://openjms.sourceforge.net/
Joram
http://joram.objectweb.org/
Jotm
http://jotm.Objectweb.org/
Struts
Http://jakarta.apache.org/struts/
Cocoon
http://cocoon.apache.org/
Turbine
http://jakarta.apache.org/turbine/
Velocity
http://jakarta.apache.org/Velocity/
Tapestry
http://jakarta.apache.org/tapestry/
Webwork
http://opensymphony.com/webwork/
Jetspeed
http://jakarta.apache.org/jetspeed/
Cocoon Portal
http://cocoon.apache.org/
Open for Business (OFBIZ)
http://www.ofbiz.org/
Compiere
http://www.compiere.org/
Infosapient
http://info-sapient.sourceforge.net/
JPOS
http://www.jpos.org/
Mercator
http://www.globalretailtech.com/
Cofax
http://www.cofax.org/
OpenCMS
http://www.opencms.org/opencms/
JasperReports
http://jasperreports.sourceforge.net/
DataVision
http://datavision.sourceforge.net/jfreereport
http://www.jfree.org/
JCHARTS
http://jcharts.sourceforge.net/
IText
http://www.lowagie.com/itext/
Apache FOP
http://xml.apache.org/fop/
POI
http://jakarta.apache.org/poi/
Cron
http://www.linux.org/
Jcrontab
http://jcrontab.sourceforge.net/
Quartz
http://www.quartzscheduler.org/
Eclipse
http://www.eclipse.org/
NetBeans
http://www.netbeans.org/
Squirrel
http://squirrel-sql.sourceforge.net/
Tora
http://www.globecom.se/tora/
DBVisualizer
http://www.minq.se/products/dbvis/
TOAD
http://www.toadsoft.com/
Cvs
http://www.cvshome.org/
Subversion
http://subversion.tigris.org/
CVSWeb
http://www.freebsd.org/projects/cvsweb.html
Viewcvs
http://viewcvs.sourceforge.net/
Docbook
http://www.docbook.org/
Openoffice
http://www.openoffice.org/
Structured text
http://www.zope.org/documentation/articles/stx
MoinMoin Wiki
Http://moin.sourceforge.net/
Usemod wiki
http://www.usemod.com/cgi-bin/wiki.pl?usemodwiki
Jabber
http://www.jabber.org/
Mailman
http://www.gnu.org/software/mailman/
Eclipse Modeling Framework
http://www.eclipse.org/emf/
Argouml
http://argouml.tigris.org/
Poseidon Community Edition
http://www.gentleware.com/
Xdoclet
http://xdoclet.sourceforge.net/
Middlegen
http://boss.bekk.no/boss/middlegen/
Jostraca
http://www.jostraca.org/
Junit
http://www.junit.org/
CACTUS
http://jakarta.apache.org/cactus/
Jmeter
http://jakarta.apache.org/jmeter/
Grinder
http://grinder.sourceforge.net/
Bugzilla
http://bugzilla.mozilla.org/
Scrabarab
http://scarab.tigris.org/
JIRA
http://www.atlassian.com/software/jira/
ITracker
http://www.cowsultants.com/
Beanshell
http://www.beanshell.org/
Jython
http://www.jython.org/
JRUBY
http://jruby.sourceforge.net/groovy
http://groovy.codehaus.org/
Aspectj
http://eclipse.org/aspectj/
Ant
http://ant.apache.org/
Maven
Http://maven.apache.org/
ANTHILL
http://www.urbancode.com/projects/anthill/
CruiseControl
http://cruisecontrol.sourceforge.net/