Tool to synchronize PostgreSQL DDL and data databases
Here are some tools that have been around for a while, though I have not used any of them:


https://github.com/jmafc/Pyrseas
http://www.andromeda-project.org/
https://labs.omniti.com/labs/pgtreats/wiki/getddl


I have a feeling there is at least one more floating around, but a quick search didn't trigger any other links for me.