Migra – A schema diff tool for PostgreSQL
This looks interesting.<p>If you're using SQLAlchemy, Alembic is a good migration management / generation / application tool: <a href="http://alembic.zzzcomputing.com/en/latest/" rel="nofollow">http://alembic.zzzcomputing.com/en/latest/</a>, and works with most (all?) the databases supported by SQLAlchemy. It doesn't handle every kind of database object / attribute thereof, but it's reasonably easily extensible.