MongoJob is a job queuing system inspired by Resque, and using MongoDB as a backend.

MongoJob is specifically designed to handle both long and short-term jobs.

• Persistent, database-backed queues and jobs
• Worker based on EventMachine
• Multiple ways to invoke jobs by the worker: process forking, fiber (for non-blocking jobs), blocking (in-line)
• Pinging and reporting - workers report status every few seconds
• Jobs with status - jobs can report progress and set custom status
• Web interface with current workers, jobs etc.

• MongoJob-deamon that monitors workers and jobs, kills timed-out ones
• Job rescheduling upon failure
• Cron-like job scheduling
• More complete web interface
• Command-line interface
• Documentation

The library is in early stage of development. If you are looking for a robust job scheduling system, I bet Resque is much more stable now and I highly recommend it to anyone.