Quartz Enterprise Scheduler .NET
“Quartz is a job scheduling system that can be integrated with, or used along side virtually any other software system.”
ref: http://www.quartz-scheduler.net/documentation/faq.html
Walkthrough: Scheduling jobs using Quartz.net – Part 1: What is Quartz.Net?
http://geekswithblogs.net/TarunArora/archive/2012/04/10/walkthrough-scheduling-jobs-using-quartz.net-ndash-part-1-what-is.aspx
Quartz Enterprise Scheduler .NET source
https://github.com/quartznet/quartznet