Apache CouchDB

Apache CouchDB excels at managing data for applications that must function reliably both online and offline. Its master-master replication allows data to flow bi-directionally, syncing changes automatically when a connection is restored. This makes it a top choice for mobile apps and distributed web services. As a document database, it provides a natural fit for storing application data without complex object-relational mapping. You can start with a simple single-server setup and effortlessly scale to a clustered environment as your user base grows, ensuring your app remains responsive and data-consistent under any condition.