ForgeRock states that you need to buy a "subscription" for production.
Blogs like this suggest I'm not the only one to be confused.
Wikipedias page on ForgeRock suggests it's only the binaries you need a license for (if you compile yourself then is this ok?).
And the OpenAM project site suggests two licenses apply. Though one of these (the first one) states "This License represents the complete agreement concerning subject matter hereof" so how can they then go on to apply another "non-commerical" Creative Commons license constraint?