1.jobrunr / jobrunrAn extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.java-8background-jobsparallel-processingschedulingscheduled-jobsjava+3 moreJavaOther license3.1K total327 forks+164 starsfrom 2,939 · score 5.11
2.azkaban / azkabanAzkaban workflow manager.workflow-engineazkabanschedulinghacktoberfestJavaAPACHE-2.04.5K total1.6K forks+19 starsfrom 4,493 · score 3.00
3.ical4j / ical4jA Java library for parsing and building iCalendar data modelsicalendarschedulinglibraryjavaJavaBSD-3-CLAUSE841 total225 forks+11 starsfrom 829 · score 2.48