SymmetricDS - SymmetricDS is an asynchronous database replication software package that supports multiple subscribers and bi-directional synchronization.

Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.

Kettle Pentaho - Pentaho Data Integration ( ETL ) a.k.a Kettle

Triggi - Connect your devices, apps and services to Triggi and make them all work together.

CData Sync - Straightforward data synchronizing between on-premise and cloud data sources with a wide range of traditional and emerging databases.

ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.