Hi all.
SublimePySide adds support to develop PyQt4 and PySide applications in a more friendly way. It implements some features already present in QtCreator and adds others ones like PyQt4 conversion to PySide (or PySide to PyQt4) syntax, preview UI forms, Qt Designer and friends integration etc, etc.
You con get it from package control or just cloning the repo from github.com/DamnWidget/SublimePySide
Documentation in the Github project site.
Regards.