The following open source projects are referenced by Core Data:

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

Spring Data JPA (Apache 2.0) - http://projects.spring.io/spring-data-jpa/
http://docs.spring.io/spring-data/jpa/snapshot-site/license.html

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

Apache MQ (Apache 2.0) - http://activemq.apache.org/
http://activemq.apache.org/

Paho (EPL) - http://www.eclipse.org/paho/
http://www.eclipse.org/legal/termsofuse.php

GSON (Apache 2.0) - https://github.com/google/gson
https://github.com/google/gson/blob/master/LICENSE

Geronimo XBean (Apache 2.0) - http://geronimo.apache.org/xbean/
http://geronimo.apache.org/xbean/what-is-the-license.html

JeroMQ (Mozilla Public License 2.0) - https://github.com/zeromq/jeromq
https://github.com/zeromq/jeromq/blob/master/LICENSE

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