sqlmap : sqlmap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of databa...
Pyramid : Pyramid is a very general open source Python web framework.
Alembic : Alembic is a new database migrations tool, written by the author of SQLAlchemy.
Roll : Roll is a pico framework with performances and aesthetic in mind.
Flask : Flask is a microframework for Python based on Werkzeug, Jinja 2 and good intentions. And before you ask: It's BSD licensed!