Languages (Primary)

Java 5/6, Python, Ruby, Javascript

Languages (Secondary)

C#, PHP, Scala, Clojure, Lisp, Perl, R.

Database and ORM Technologies:

ORM: Hibernate, HSQLDB, OpenJPA, Cassandra, Hadoop, HBase
RDBMS: Oracle 9i,10g,11g. SQL Server 2008, MySQL, Postgres.

Search:

Lucene, SOLR, ElasticSearch

Data Analysis and Workflow:

Pig, Oozie, JBPM, Drools

Web

Framework: Google GWT, Struts 1.x/2.x, Spring MVC, StringTemplate, Django, Rails, CakePHP, Codeignitor
Templating: JSP, Velocity, Freemarker
Javascript: EcmaScript, DOJO, JQuery, Mootoools, EXTJs, Prototype, Scriptaculous

XML Technologies

XML (SAX, DOM, StAX – JAXP), XSLT (Saxon), XPath, JAXB, XML Schema, RelaxNG.

Integration Frameworks:

Spring, Mule, Camel, ActiveMQ

Testing:

JUnit, TestNG, Mockito, JMock, PowerMock, Google Caliper, HttpUnit, HTMLUnit, HPricot, Beautiful Soup
Selenium, Windmill (UI Tests), JMeter, OpenSTA, Grinder (Performance)

Utility Frameworks:

Guava, Commons Lang, Commons IO, Commons Codec, POI, Tika

Infrastructure:

App Servers: Tomcat, Jetty, JBoss, Weblogic, Apache, Lighttpd
Operating Systems: Linux (Ubuntu, Centos, RHEL). Windows (9x, 2000, XP, 7). Sun/Oracle Solaris 9,10,11.
Email Servers: Postfix, Courier IMAP, Exim
Shells: Bash
Scripting: Sed, Awk, Grep
Monitoring: Nagios, Zabbix, Ganglia
Firewalls: iptables