I used to build (product) software mainly in the health care sector for the last 10 years. Now I'm building software with my team on project scope. Means we customize the product software and add addtional interfaces, business logic specific for the customers. That includes from scripting in the product itself (VBScript & JavaScript), additional software to support the product and the customer workflows (any fitting language, mainly C#/WPF) to 3rd party interfaces and Custom webclients (Java, nodejs, HTML5). Sometimes some exotic (in terms of occurrence) stuff like python comes up.