开源相关社区/项目一览备查,欢迎补充

开源项目托管:

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/

顶级开源项目:

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://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/

http://httpd.apache.org/ (Apache)
http://tomcat.apache.org/
http://nginx.org/
http://caucho.com/ (Resin)
http://squid-cache.org/
http://cherokee-project.org/
http://lighttpd.net/

与开发相关框架/工具等:

http://subversion.org/ (SVN)
http://git-scm.com/
http://openoffice.org/
http://monodevelop.com/
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/ (NHibernate)
http://jboss.org/
http://mybatis.org/
http://springsource.org/ (Spring)
http://djangoproject.com/
http://jquery.org/
http://prototypejs.org/
http://dojotoolkit.org/ (Dojo)

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

其他相关组织/机构等等:

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

开源许可证:http://www.cnetnews.com.cn/2011/0116/2027813.shtml