Language Details: Octave

GNU Octave is a high-level interpreted language, primarily intended for numerical computations.

Official website (see also: Wikipedia article)
Code Jam 2012 Contestants using Octave
Qualification Round
Used in 5 solutions by 3 contestants:
Round 1A
Used in 2 solutions by 1 contestants:

Submission Origin

United States (2 contestants)
India (1 contestant)
Portugal (1 contestant)