PyQtdesignerplugins installs Qt Designer plugins for PyQt4
pip install -i https://pypi.anaconda.org/petebachant/simple pyqtdesignerplugins
PyQtdesignerplugins installs Python Qt designer plugins (Matplotlib, guiqwt, ...) in PyQt4 directory.
PyQtdesignerplugins is part of the WinPython distribution project.