PostgresSQL Replicator
- An asynchronous replica engine that provides some data ownership models and many conflict resolution algorithms. [open source, GNU License]
Bucardo: Postgres replication system - Asynchronous multi-master and master-slave replication system written in Perl [BSD license].
Command Prompt - Provides a supported, production quality PostgreSQL Replication. Also offers custom programming services, consulting and managed database hosting.
DBBalancer - Load balancing multithreaded PostgreSQL connection pool that has a replication mode to keep load balanced backend servers in sync. Currently in Alpha.
PgCluster - A multi master, synchronous replication system based on the PostgreSQL database server. Wiki, frequently asked questions, example setups and downloads.
Rserv - Installation guide for triggers to provide Master/Slave replication.
Slony-I Project - A master to multiple slaves replication system supporting cascading and failover [Berkely/BSD].