Language Details: Groovy

Groovy is an agile and dynamic language for the Java Virtual Machine.

Official website (see also: Wikipedia article)
Code Jam 2009 Contestants using Groovy
Qualification Round
Used in 38 solutions by 13 contestants:
Round 1A
Used in 2 solutions by 2 contestants:
Round 1B
Used in 4 solutions by 2 contestants:

Submission Origin

United States (5 contestants)
India (2 contestants)
Austria (1 contestant)
Canada (1 contestant)
France (1 contestant)
Russia (1 contestant)
South Korea (1 contestant)
Spain (1 contestant)