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+77 starsfrom 3,026 · score 4.36
2.azkaban / azkabanAzkaban workflow manager.workflow-engineazkabanschedulinghacktoberfestJavaAPACHE-2.04.5K total1.6K forks+9 starsfrom 4,503 · score 2.30
3.ical4j / ical4jA Java library for parsing and building iCalendar data modelsicalendarschedulinglibraryjavaJavaBSD-3-CLAUSE841 total225 forks+6 starsfrom 834 · score 1.95