www.espertech.comDocumentation
The main page is similar to the below screen capture.
When you create a new note you can decide the default interpreter. By default this is Esper.
The upper right-hand corner is a drop-down that has a Logout option for logging out of your account.
Esper Notebook is provided by EsperTech Inc., builds on Apache Zeppelin and extends Zeppelin with Esper interpreters, EPL syntax highlighting and more. More information on Apache Zeppelin can be found at http://zeppelin.apache.org.
More information on the user interface can be found among the Apache Zeppelin user interface documentation at http://zeppelin.apache.org/docs/latest/quickstart/explore_ui.html.
Esper Notebook only provides the Esper interpreters.