SoapUI is a free and open source cross-platform functional testing
SikuliX version 2.0.0+ (2019+)
Marathon supports testing of Java/Swing and Java/Fx applications.
Script language for create gui test action on application to test
Simple file logger.
Enhanced Korat supports GUI, FSM, JUNG and JSON.
JTR is a Java Test Runner tool
Image based Test Automation tool (Java) - Test ANYthing, ANYwhere