PostgreSQL PITR Replication and HA utilizes PostgreSQL's Point in Time Recovery and off the shelf software such as the linux-ha project's heartbeat to implement replication and high availability.
The PostgreSQL PITR Replication and HAproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pgpitrha, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.
