Spilo, a Highly Available PostgreSQL Cluster
spilo.readthedocs.org
spilo.readthedocs.org
One can call Patroni the HA machine, and Spilo an AWS based infrastructure that uses it. So one can use Patroni for managing Postgres in your own data center.
I'd still love to see this functionality baked into PostgreSQL... having to rely on bolt-on services/proxies for this type of functionality is one of the reasons I'm less likely to consider PostgreSQL when HA are absolute requirements. Unless there's someone else whose job it is to keep it all up and running...
I'd much rather work on other things, writing software, over having to figure out N technologies in order to cobble together a viable solution. These days I'm much more inclined to reach for RethinkDB first... Though I think with a good HA story, PostgreSQL + plv8 + binary json is pretty compelling.