WWF Finland produced a tiger population test as part our IWT campaign 2014. Since there's been some interst on the source code, we decided to share it internally.
The test should be pretty easy to install for someone who takes care of your web services.
We would love to hear how it is used and learn how it's working for you. Also it would be nice to know, if you find ways to improve it or reuse the code in your context.
Digital Innovation Manager, WWF Finland
+359 40 5707963
PS. Our test is based on the great Tiger landing page by Panda.org. Thanks for the inspiration and great looks.