The product is OpenAM from Forgerock, that is both open source and expensive. https://www.forgerock.com/

Gluu is just a facade company that's recompiling it from source and distributing the binaries for free.

It supports pretty much everything you can dream of, including different password hashing and you can write your own plugins to interface with anything you like.

However it's a very complicated product. It's for a large company or a country with a dedicated team to run and customize.

P.S. Not affiliated to any of these companies. I had to do the performance assessment of these products some year ago for a government contract. https://thehftguy.com/2015/10/14/iam-benchmarks-openam-vs-ws...