Esel is a simple, powerful, and extensible expression language for JavaScript. It can be used to select information from JSON documents, as an embedded expression language in a rich web application, or as a simple text templating system.

You can download the latest stable (version 1.2) version of Esel here (tar.gz) or here (zip).

You can see a live demo of Esel here.

You can read Esel’s documentation here.

Esel has its own Google Group, here.

Do you use Esel? Rob would love to hear from you.