List of open-source communities/projects (for future reference, please add)

Open-source project hosting:

Http://www.apache.org/
Http://www.googlecode.com/
Http://www.sf.net/
Http://www.github.com/

Http://www.java.net/
Http://www.codeplex.com/
Http://www.codeproject.com/

Http://www.sndacode.com/
Http://code.taobao.org/

Top-level open-source projects:

Http://Unix.org/
Http://Linux.com/
Http://FreeBSD.org/

Http://Debian.org/
Http://Ubuntu.org.cn/
Http://CentOS.org/
Http://OpenSUSE.org/
Http://NetBSD.org/
Http://OpenBSD.org/

Http://gnome.org/
Http://kde.org/

 

Http://mysql.org/
Http://postgresql.org/
Http://pgsqldb.org/
Http://sqlite.org/

 

Http://mongodb.org/
Http://cassandra.apache.org/
Http://couchbase.org/
Http://couchdb.org/
Http://hbase.apache.org/
Http://redis.io/
Http://neo4j.org/

 

Http://memcached.org/
Http://lucene.net/
Http://lucenenet.apache.org/
Http://hadoop.com/

 

Http://mono-project.org/(Mono)
Http://java.com/
Http://php.net/
Http://perl.org/
Http://python.org/
Http://rubyonrails.org (ROR)
Http://dotgnu.org/

 

The http://httpd.apache.org/(APACHE)
Http://tomcat.apache.org/
Http://jboss.org/
Http://nginx.org/
Http://caucho.com (resin)
Http://squid-cache.org/
Http://cherokee-project.org/
Http://lighttpd.net/

Development-related frameworks/tools:

Http://subversion.org/(SVN)
Http://git-scm.com/
Http://openoffice.org/
Http://monodevelop.com/(IDE)
Http://icsharpcode.net/
Http://eclipse.org/
Http://ffmpeg.org/
Http://7-zip.org/
Http://getfirebug.com/

 

Http://struts.apache.org/
Http://castleproject.org/(Castle)
Http://hibernate.org/
Http://nhforge.org/(nhib.pdf)
Http://mybatis.org/
Http://springsource.org/(spring)
Http://springframework.net/
Http://djangoproject.com/
Http://jquery.org/
Http://prototypejs.org/
Http://dojotoolkit.org/(Dojo)
Http://json.codeplex.com/
Http://quartznet.sourceforge.net/

Http://wordpress.org/
Http://dotnetnuke.com/
Http://dotnetblogengine.net/
Http://mojoportal.org/
Http://cuyahoga-project.org/

Other related organizations/organizations:

Http://opensource.org/
Http://www.mozilla.org/
Http://freedesktop.org/
Http://gnu.org/
Http://bsd.org/
Http://x.org/

Open source license: http://www.cnetnews.com.cn/2011/0116/2027813.shtml