MRQ is heavily inspired by RQ to which we switched from Celery (http://www.slideshare.net/sylvinus/why-and-how-pricing-assis...)

However it is a complete rewrite because we felt we couldn't add gevent support and other features to provide extreme visibility without major changes. If you don't need those 2 things, you may want to check out RQ instead for now, it's still a very good piece of software.