At the bank I work we use Matlab, when I'm working I tend to do things in the Octave's CLI for prototyping and only translating it to Matlab if others need to work with it.
EDIT: Also I work with Python, and prefer it to Matlab, although not much for numerical stuff, the majority of department are civil and mechanical engineers who are not that computer savvy as electrical/computer engineers are, they generally know some C and Matlab.