I used Java, PL/SQL (Oracle), PHP5, XML, HTML, CSS, JavaScript, jQuery.
I develop desktop Java and web based applications and maintain company's ERP system for printing facilities (such as EurometFilms and Pof-Flexo). My Java applications and applets worked with barcode scanners, printers and weighing machines.
Here are screenshots of one Java application, it is used on touchpanels (click for full size):
Here are screenshots of web forms (click for full size):
