| Name | Description | Type | Package | Framework |
| IO | Container for input/output handles. | Class | org.codehaus.groovy.tools.shell | Groovy |
| IO .Verbosity | Class | org.codehaus.groovy.tools.shell.IO | Groovy | |
| Logger | Provides a very, very basic logging API. | Class | org.codehaus.groovy.tools.shell.util | Groovy |
| MessageSource | Message source backed up by one or more ResourceBundle instances for simple i18n support. | Class | org.codehaus.groovy.tools.shell.util | Groovy |
| Preferences | Container for shell preferences. | Class | org.codehaus.groovy.tools.shell.util | Groovy |