A big collection of open-source technology communities: PHP, Python, Ruby, and SOA

Java technical site

Java site
Sun Java	Sun Developer Network	Java.net	Java developer's journal
Theserverside	Jguru	IBM Java	Java lolobby
Onjava	Oracle Java Developer Center	Javaworld	Apache Java
Java Chinese site
IBM Java China	Bea dev2dev China	Oracle Java Developer Center	Sun China Technology Community
Matrix-dancing with Java	Javaeye	Javaresearch	China JAVA Mobile Network
J-way	Matrix	Easyjf	Operamasks
Java Open Source Software Classification
AOP, IOC	Blog	Build Systems	Bytecode
Cache	Charting & Reporting	Chat	CMS & Portal
Code analyzers	Code beautifiers	Code coverage	Collections
JDBC & connection pools	Web Crawlers	Database	J2EE Server
ERP & CRM & PM	ESB & SOA	Forum	Groupware
HTML parsers	Java ide	J2EE frameworks	Persistence
JMS, Mom	JMX	Job schedulers	JSP tag
Logging	Mail clients	Network	Parser generators
RSS & RDF	Rule Engines	Scripting languages ages	Search Engines
Source Control	SQL clients	Template Engines	Testing tools
UML & Modeling	Web frameworks	Web mail	Web Server
Web Services	Web Testing	Wiki	Workflow
XML parsers	Xml ui toolkits	General Purpose	Installers generators

Ruby technology site

Ruby site
Ruby	Ruby on Rails	Ruby Central	Rubyforge
Activerecord	Actionpack	Webrick
Mod_ruby	Ruby MySQL modules	Ruby PostgreSQL modules	SQLite/Ruby
Rubygems	Mongrel	OG + nitro	Camping
Rails API	Ruby standard library	Ruby Core	Ror official blog
Ruby Forum	Ruby eclipse plugin
Ruby online documentation & books
Ruby User's Guide	Programming Ruby	Ruby 1.6 Library Reference	Ruby Language Reference Manual (1.4.6)
Ruby Chinese site
Ruby on Rails Chinese Community Forum	Ruby Chinese network Ruby Chinese community	Chinaonrails	Ruby_cn @ csdn
Ruby open-source project
Ruby on Rails open-source project	Typo blog	Radrails ide	Substruct
Hieraki2	Freemis	Snaps	Wagn
Collaboa	Llor. Nu	RCMs	Rforum
Oswiki	Riki	Gal	Ozimodo
Blackjax	Eribium	Boxroom	URL. markr
Projectlounge	Madeleine	Rdoc	Instiki
Websites built using Ruby Technology
37 Signals	43 things	43 places	43 people
Shopify	Fluxiom	Strongspace	Odeo

Python technical site

Python sites
Python	Python enhancement proposals	Jython	Mod_python
Boost. Python	Pygame	Yahoo! Developer Network
Chinese community
Python.cn	Czug	Woodpecker
Web Programming
CGI scripts	Zope	Django	Turbogears
Plone	Python Paste	Pylons	XML Processing
Quixote	Karrigell	Webpy	Cherrypy
Myghty	Cheetah	Webware for python	Aquarium
Subway	Spyce	Tahchee	Python CGI
Databases
Database modules	Persistence	Standard Database API	Sqlobject
Networking
Twisted	Sockets
Software Development
TRAC	Roundup	Scons	Buildbot
Apache Gump	Activegrid	Easyeclipse	Boaconstructor

PHP technical site

PHP site
PHP	Zend Technologies	Planet PHP	PHP Resource Index
PHP projects at SourceForge	Freshmeat.net PHP Projects	PHP classes	Phpgacl
Open Source CMS	Exceed PhP	PHP China	China PHP Alliance
PHP Open Source Software Classification
CMS & Portal	E-learning	Forum	Image galleries
Blog	Wiki	E-commerce	Groupware

Security

Identity & SSO
Openid	Sourceid	Opensso	Josso
Directory Server
OpenLDAP	Apacheds	Opends	Fedora Directory Server
SOA & Web Services
WS-Security	WS-Trust	WS-Federation	WS-secureconversation
XACML	SAML | opensaml	XML Encryption	XML Signature
Security Tools
ClamWin	ClamAV	Osstmm	Ossec HIDS
Nessus	Wireshark	Ethereal	Snort
Netcat	Hping	Tcpdump	Kismet
Ettercap	Nikto	GnuPG	Ntop
Etherape	OpenBSD Packet Filter	Tor	Chkrootkit
Nagios	Ossim	Base (PHP)	Sguil
Bastille	Truecrypt
Other
Ossec HIDS	OpenSSL	Mod_ssl	Openca
OpenBSD	OpenSSH	Acegi for spring	SELinux
Firewall & VPN
FreeS/WAN	Netfilter/iptables	Smoothwall	Leaf
Modsecurity	Seawall	Openvpn
Router
XORP	Zebra	Lr101	LRP
DSR	Freesco

Note: This article from http://www.huihoo.com/(gray fox power)