Language Details: Racket

Racket (formerly named PLT Scheme) is a general purpose, multi-paradigm programming language in the Lisp/Scheme family

Racket article on Wikipedia (see also: official website)
Code Jam 2012 Contestants using Racket
Qualification Round
Used in 20 solutions by 8 contestants:
Round 1A
Used in 1 solutions by 1 contestants:
Round 1B
Used in 1 solutions by 1 contestants:

Submission Origin

Canada (5 contestants)
Brazil (1 contestant)
Japan (1 contestant)
Ukraine (1 contestant)