Roassal is an engine for scripting visualizations. It is developed by Object Profile.
To get the latest version from squeaksource.com, you should execute the following code:
Gofer new
squeaksource: 'Roassal';
package: 'ConfigurationOfRoassal';
load.
(Smalltalk at: #ConfigurationOfRoassal)
perform: #loadDevelopment
Roassal is shipped with the Moose Suite.