I use them all. Since I'm a web developer I use a lot of Javascript and PHP. But as far as programming goes i use Ruby, C# and Python. But overall coding, I know ASP, Linux, Javascript, C#, C++, Ruby, Python, CSS, HTML, PHP, XML, SQL. It seems like a lot but if you can learn a couple of languages the syntax of other languages becomes a lot easier to understand, and ive been doing this for like 4 years.