Popular?
Popular does not equal useful though.
If you want to limit the list to useful, then that would be C, C++, (oh, go on then....) java, Fortran, assembler. I'm sure there's a couple of other too.
You might even find the odd shell script useful, or even (gawd help us) Perl, but these are hacky scripting languages and while definitely useful, not really what I would categorise as a genuine programming language for making stuff work.
Notably absent from my list would by Python. I don't feel the need to elucidate.
Biting the hand that feeds IT
