1.apache / incubator-kieApache KIE (Knowledge Is Everything) is the home of Drools, OptaPlanner, jBPM, and Kogito.rule-enginejavadmnhacktoberfestapachedrools+3 moreJavaAPACHE-2.06.3K total2.6K forks+63 starsfrom 6,277 · score 4.16