Versioning is a project mainly written in ..., based on the View license.
Versioning of changes to database
Versioning
This project strives to provide simple way to manage changes to database.
Instead of making changes on development server, then finding differences between production and development, deciding which ones should be installed on production, and finding a way to install them - you start with writing diffs themselves!
More detailed description is (so far) in here: http://www.depesz.com/index.php/2010/08/22/versioning/
To install versioning simply run install.versioning.sql in your database (all of them: production, stage, test, devel, ...).
If you'd like to suggest new functionality or ask anything - please use contact form on http://www.depesz.com/