Logo is a project mainly written in ..., it's free.
Logo for clj-la
This is the logo of the clj-la group.
There is an Adobe Illustrator project and a few variations exported as PNG.
These images by Rick Mouritzen are licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.
The palm trees in the logo are derived from Palm Trees by Free Design Magazine.