- Celery: Distributed Task Queue http://www.celeryproject.org/
- https://github.com/gevent/gevent
- https://github.com/pytest-dev/pytest/ 
- https://github.com/fabric/fabric/ Simple, Pythonic remote execution and deployment.
- http://gunicorn.org/
- A Powerful Spider(Web Crawler) System in Python. https://github.com/binux/pyspider
- https://scrapy.org/ 
- Full-screen console debugger for Python https://github.com/asmeurer/PuDB
- Python job scheduling for humans. https://github.com/dbader/schedule
- https://github.com/Supervisor/supervisor
- deployment: 
  - option 1 : django + env + supervisor +gunicorn +nginx 
  - option 2 : django + supervisor +gunicorn +nginx 生产环境只跑一个服务的话用不用 env 无所谓 
  - option 3 : docker(django + gunicorn) + nginx