The following open source projects are referenced by Core Command:

Spring Boot (Apache 2.0) - https://projects.spring.io/spring-boot/
https://github.com/spring-projects/spring-boot/blob/master/LICENSE.txt

Spring Framework (Apache 2.0) - http://projects.spring.io/spring-framework/
https://github.com/spring-projects/spring-framework

Spring Cloud (Apache 2.0) - http://projects.spring.io/spring-cloud/
https://github.com/spring-cloud/spring-cloud-release/blob/master/LICENSE.txt

Log4J (Apache 2.0) - https://logging.apache.org/log4j/2.x/
https://logging.apache.org/log4j/2.0/license.html

Junit (EPL 1.0) - http://junit.org/junit4/
http://junit.org/junit4/license.html