The Eclipse Dash License Tool identifies the licenses of content. It is intended primarily for use by Eclipse committers to vet third party content used by their Eclipse open source project.
The license tool has a Maven plugin that you can use find license information for all of your Maven project’s dependencies. That is, the Maven plugin can identify the entire transitive closure of dependencies described in your project’s pom.xml file(s) (dependencies of dependencies recursively) and from that sort out curated license information.