Qudo is simple and extensible job queue manager system.
Your application can insert job into DB ,that is managed by Qudo. And
Your application can get & execute job by Qudo worker. Qudo
corresponds to deal with DB as MySQL and SQLite.
If you add Hook Point around job's working method, you can add it
easily and many point of work milestone. Qudo is consided about
adding Hook Point Flexibility.