JTemporal - A framework of components providing functionality for time related applications (for the moment instant, period, mediators managing temporal associations). [Open source, LGPL] JDring - Task scheduling system for Java, similar to Unix cron and at daemons. Fires events at specified times. Alarms are added dynamically in any order and can be one-shot or repetitive. [Open Source, LPGL] cron4j - Java library implementing a UNIX cron-like scheduler. Site includes documentation and download option. [LGPL] Job Scheduling in Java - Four page article explaining how to implement a job scheduler using the standard Java Timer API, and with use of the Quartz open source library. (2004) Quartz Enterprise Job Scheduler - Supports Java SE and Java EE, simple and complex schedules, from tens to tens-of-thousands of jobs, several enterprise features like JTA transactions and clustering. Site includes documentation and download option. [Open Source, Apache License v2] Jcrontab - Scheduler that reads and stores the tasks to execute in a file, a data base or an EJB and provides a web basic UI. [Open source, LGPL]