foreign key associations: best practices?

Looks like http://www.redhillonrails.org has been taken over by ads
and considering how old the RedHill plugins are getting I was
wondering if people are still using the RedHill foreign_key_migrations
plugin to setup foreign key relationships? If not what are people
using to replace it?

Thanks,
Aaron

I'm using foreigner. It works great for me. Foreign keys get correctly
put into schema.db and everything.

http://github.com/matthuhiggins/foreigner