What are useful Java frameworks?

Question

Java

What are useful Java frameworks?
Example: Collections, Hibernate, Spring.

Answer 1

Web: Grails, Play, Tapestry, Primefaces, Vaadin
Утилиты: Guava, Joda, Quartz, H2, Camel
Backend : Spring, Spring Security, Hibernate, MyBatis, Jooq
Unit - тестирование: Mockito, PowerMock, Junit, TestNG, Spock
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