Oracle, MSSQL, MySQL, HSQL, Interbase/Firebird, dBase, PostgreSQL, Informix, DB2, MariaDB, MS Access, Paradox, IMS, Sybase, MongoDB, RavenDB, BigTable, Cassandra, CouchDB, Hypertable.
Java EE, Java SE, Web Services, JSON, REST, RMI, JNDI, JSP, JSF, Velocity, SSL, JBoss, JBoss Seam, Apache, Apache Wicket, GlassFish, Drools, Hibernate, JPA, EJB, Seam, Swing, xSwing (in-house extension of Swing library), Spring, Freemarker, GWT, Thinlet, CSS, JQuery, HTML, xHTML, MVC, PrimeFaces, RichFaces, AngularJS, Grails, GORM, ASP .NET Web Forms, Silverlight, AJAX.
Delphi, Pascal, C, C++, C#, .NET, Java, Objective C, Assembler, Visual Basic, Groovy(Grails), XML/XLS, SGML, UML, Algol, Prolog, LISP.
ant, escript, PHP, JavaScript, Flash/ActionScript, Flash Lite, TSQL, noSQL, PL/SQL, Perl, Python, Ruby.
MS Visual Studio, Delphi, JBuilder, Eclipce, NetBeans, C++ Builder, xCode, Borland Developer Studio, PL/SQL Developer.
Jasper Reports, iReport, Rave Reports, Crystal Reports, Aperte Reports.
Java ME, Windows Mobile, Windows Phone, Android, Apple iOS, Symbian, BlackBerry OS, Bada, Brew.
Scrum, Agile, Prince2, PMI/PMBOK.
Visual Basic for Applications (Excel), OpenGL, DirectX, DirectShow, GIS.