Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Kettle Pentaho - Pentaho Data Integration ( ETL ) a.k.a Kettle
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
SymmetricDS - SymmetricDS is an asynchronous database replication software package that supports multiple subscribers and bi-directional synchronization.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
CData Sync - Straightforward data synchronizing between on-premise and cloud data sources with a wide range of traditional and emerging databases.