As a developer, you might want to quickly check out the programming API's in your favorite language and build your app. This can be achieved by referencing a refcard for the most commonly used programming languages. A refcard provides a quick list of the APIs when needed. The Couchbase Refcard on DZone is a handy reference guide for developers using Java, .NET or Ruby to develop their Couchbase apps. It offers a concise and easily accessible resource for building applications with Couchbase.