* Programming languages : Java, PHP, XML, XHTML, SQL, JPQL, HQL, XSL, CSS 2, Javascript, AJAX
* Programming languages which we use as glue : C/C++, PL/SQL, pgSQL, Perl, Shell scripting
* Desing and modelling: UML, ERD
* Database servers and micro-databases: PostgreSQL, MySql, Oracle Database Server, HSQLDB, Apache Derby
* Java technologies and libraries : JEE, JPA, Hibernate, Apache FOP, Stripes framework, Apache Cocoon, JasperReports, Apache Ant, Junit
* Content management systems: OpenCms
* Linux system administration