Programming technologies
Java EE, Java SE
JavaScript, AJAX, CSS, XHTML
Java ME, Android
Programming frameworks
Struts, Spring, Hibernate
Database connectivity
JDBC, ODBC
Libraries and software components
JasperReports, JFreeChart, JPivot, JQuery, jsGantt, SIMILE Timeline, SIMILE Timeplot, Pentaho Mondrian, Java Excel API, Apache FOP, Apache Velocity, FullCalendar, jqGrid, DWR, log4j, jDOM, iCal4j, iText, SimpleCaptcha, TinyMCE, Booklet, Barousel, and so on.
Database servers
PostgreSQL, Oracle Database, MySQL, SQL Server
Application servers
Apache Tomcat, Oracle Application Server, JBoss
Web servers
Apache HTTP Server, IIS
Development and specification tools
NetBeans, Eclipse
DB-MAIN, Adobe Dreamweaver, Adobe Flash
Microsoft Visio, ArgoUML, StarUML, SmartDraw
Version control system
Subversion
Management tools
QRP, SuSer
Specification techniques
UML 2.0, OCL
Standards
XML, HL7, DICOM, BibTeX, iCalendar