| Name | Description | Type | Package | Framework |
| CommandSink | Created by IntelliJ IDEA. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| CompositeException | This is an exception made up of one or more subexceptions. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| ContextManager | You can get two different contexts from the ContextManager: the container context (m_childContext) | Class | org.apache.avalon.fortress.util | Apache Avalon |
| ContextManagerConstants | Provides constants used to access the Context object for containers. | Interface | org.apache.avalon.fortress.util | Apache Avalon |
| CyclicDependencyException | CyclicDependencyException is thrown any time the DAG verifier finds a cycle. | Class | org.apache.avalon.fortress.util.dag | Apache Avalon |
| DirectedAcyclicGraphVerifier | DirectedAcyclicGraphVerifier provides methods to verify that any set of vertices has no cycles. | Class | org.apache.avalon.fortress.util.dag | Apache Avalon |
| FortressCommandFailureHandler | The default CommandFailureHandler used by Fortress to log any failures encountered while executing commands. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| FortressConfig | Helper class to create a m_context for the ContextManager. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| LifecycleExtensionManager | LifecycleExtensionManager class. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| OverridableContext | The OverridableContext allows you to "null" out entries, even if they are in a parent context. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| ReflectiveConfigurator | A creator that configures a component based on reflection. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| Service | This class handles looking up service providers on the class path. | Class | org.apache.avalon.fortress.util | Apache Avalon |
| Vertex | Vertex is used to track dependencies and each node in a graph. | Class | org.apache.avalon.fortress.util.dag | Apache Avalon |