Java, JS, and if you can call it a programming language HTML. As a part of my job, I've learned a good deal about Python as well. They're easy languages to learn, IMO. I also know a GIS "language" called ESRI's ArcGIS, it's built upon the Python model engine, hence the requirement to learn some Python. I have dabbled in C and C++, but I wouldn't know a class from a variable now if my life dependent on it.