SWELL defines an English-like domain-specific language (DSL) for testing Web and Swing applications. It also provides interpreters that can run scripts in the language as an external DSL. SWELL uses VisualLangLab (http://vll.java.net/ as its parser-generator. User documentation is available in the Docs (http://java.net/projects/swell/sources/svn/show/SWELL/trunk/docs) directory.
VisualLangLab is a completely visual, simple, and easy to learn IDE for developing parsers without code or script of any kind. A grammar is represented as a tree with distinct icons for various elements, and is edited by using the mouse to invoke menu-bar and context-menu operations.