SymmetricDS is Web-enabled, database independent, data synchronization/replication software. It uses Web and database technologies to replicate tables between relational databases in near real time. The software was designed to scale for a large number of databases, work across low-bandwidth connections, and withstand periods of network outage. It includes support for Oracle, MySQL, PostgreSQL, H2, HSQLDB, Derby, MS SQL Server, Firebird, IBM DB2, Informix, Interbase, and Greenplum databases.
Mammoth PostgreSQL Replicator uses a transaction log and async replication model that nearly eliminates extra load on your master server regardless of the number of slaves you have in production. It supports advanced features such as large object, role, and ACL (grant/revoke) replication. It also supports promotion and failover.
Cressida SynQuest for WebSphere MQ is a highly optimized, production-strength replication and synchronization tool utilizing the MQI API exit facility. It is designed to keep the content of WMQ queues on separate queue managers synchronized by performing a MirrorQ type application. SynQuest provides a solution for maintaining disaster recovery backups of queue managers in those cases where a hardware solution (i.e. mirrored disks) is impractical due to distance or associated hardware costs.
zrep provides an easy-to-use program to manage zfs filesystem replication and failover. No configuration files are required. The program is developed under Solaris, but may work with any up to date zfs implementation. The executable is a single script. Initialization does a full data copy, but subsequent syncs are incrementals. It uses internal locking to make sure there is no danger of overlap if you just shove it in cron to run every minute. Design target is more "near-time replication", since the sync can be run every minute or more. However, it could conceivably be used for "backup" purposes as well.
Galera wsrep provider is a dlopenable generic replication library which implements the wsrep provider API. It provides very efficient synchronous replication, and multi-master and "parallel applying" capabilities for opaque data buffers. Its primary focus is data consistency. A transaction is either applied on every node, or not at all. It works anywhere TCP works, including on WAN, and can utilize UDP multicast where available. It is used by the MySQL-wsrep patch project to create true multi-master MySQL/InnoDB clusters.
SymmetricDS Pro is software for data replication, change data capture, and data transformation in a heterogeneous enterprise environment. Performance and scalability allow it to replicate thousands of databases asynchronously in near real time. With flexible configuration and powerful scripting and programming interfaces, it can be extended to meet a range of requirements. Based on the popular open source version of SymmetricDS, the Pro edition enhances the experience with a click-through installer, Web management console, and production support.