Open source is a not a good idea, it's a must !

Below you'll find a list of open source projects which in my opinion are stable and high-quality. Every enterprise developer with a little decency should have these installed Note that this list is intended as a guide to high-quality production-ready projects, not as a list of all projects I've used.

I also have setup a project myself : http://jbpm.org This is a workflow engine with a huge potential but it needs to stabilize for a month or so before it can be called stable and high quality.

Linux

• Red Hat : http://www.redhat.com
• Mandrake : http://www.mandrakelinux.com
• Suse : http://www.suse.com
• Debian : http://www.debian.org/

Web & app-servers

• Apache : http://www.apache.org
• JBoss : http://sf.net/projects/jboss
• Tomcat : http://jakarta.apache.org/tomcat/
• Jetty : http://www.mortbay.org/jetty

IDE

• eclipse : http://www.eclipse.org/
• solarecplipse (plugin) : http://solareclipse.sourceforge.net/
• JEdit : http://www.jedit.org
• NetBeans: http://www.netbeans.org

UML modelling

• AgroUML : http://argouml.tigris.org/

Source Code Management

• CVS : http://www.cvshome.org

Build tool

• Ant : http://ant.apache.org/

Code generation

• XDoclet : http://xdoclet.sourceforge.net/

Bugtracking

• Bugzilla : http://www.bugzilla.org/
• Scarab : http://scarab.tigris.org/

Search engine

• Lucene : http://jakarta.apache.org/lucene

O/R Mapping

• Hibernate : http://www.hibernate.org (IMHO project of the decade !)

JDBC client

• DbVizualizer : http://www.minq.se/products/dbvis/ (freeware)
• jFaceDBC : http://jfacedbc.sourceforge.net
• SQuirreL SQL : http://squirrel-sql.sourceforge.net/

Database

• PostgreSQL : http://www.postgresql.org
• MySQL : http://www.mysql.com/
• Firebird : http://www.firebirdsql.org/

Logging

• Log4j : http://jakarta.apache.org/log4j

Web Dev

• Struts : http://jakarta.apache.org/struts
• WebWork : http://www.opensymphony.com/webwork/
• Tapestry: http://jakarta.apache.org/tapestry

Testing & quality

• JUnit : http://www.junit.org
• Cactus : http://jakarta.apache.org/cactus
• HttpUnit : http://httpunit.sourceforge.net/
• PMD : http://pmd.sourceforge.net/
• CheckStyle: http://checkstyle.sourceforge.net/
• findbugs: http://www.cs.umd.edu/~pugh/java/bugs/
• JDepend: http://www.clarkware.com/software/JDepend.html

Open Source Project Sites

• http://sf.net
• http://tigris.org
• http://objectweb.org
• http://jakarta.apache.org
• http://apache.org

Tom Baeyens : http://sdco.be
Java enterprise consultant specialized in workflow
Founder of http://jbpm.org
Member of the expert group of JSR207 "Process Definition for Java"

-- Main.tombaeyens - 23 Sep 2003

-- Main.vbrabant - 03 Feb 2004