whirly
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whirly is a framework wrapper for the scalable, non-blocking web server tornado,
which provided an extension system to enhance the use of tornado web server.
Whirly is compatible with Google App Engine in WSGI mode.

Already provided extensions:
* Session
* Storage (MySQL, PostgreSQL, SQLite, MongoDB, Datastore, Redis)
* Auth
* Cache
* Flash Message
* Support different template engines