Indeed, it's excellent. I'm using it with an ldap back end for my companys internal infra. Unfortunately it doesn't support u2f as a 2nd factor yet, just totp codes. That's the only thing I can think of as critique for keycloak, so it's pretty damn good.
Last time I looked at gluu it seemed massive, requiring a beefy server dedicated to running it. It came with an ldap server etc, meaning I seemingly couldn't us my own. I'll have to revisit, but last I checked its way too much.
Bookmarked, thanks. I'll be sure to try gluu again and giving it its own server if u2f becomes a requirement, or if I need any of the other features it offers.
> Think of Keycloak as bleeding edge with quick releases, unpatched, and limited community support. [1]
Seems fine for research, but using it in production seems risky.
[1] http://www.keycloak.org/support.html