Single Sign-On

Is it just me, or is Microsoft the only vendor out there that gives you SSO in all their products, free?  Novell requires you buy their add-on product.  Oracle has nothing relevant.  Never gonna happen on any Linux distro out of the box.  Too many variables.

The integration alone is reason enough to use Microsoft products.  Is it just me, or do people choose to go anti-Microsoft out of spite?

Just a thought.