Shakya is a Free Software (GPL) framework for easy and quickly building powerfull applications with Python and PyGTK. Besides, there is also an IDE, made with this same framework, thus users can graphically desing Shakya/PyGTK applications.
autoglade is a tool that automagically creates a fully working application from the GUI glade definition plus some declarative information. It can be used as a command line tool to create simple applications with no programming.
This is a very nice and simple client with GUI to connect to Net4India Broadband Server. This works on Linux/Windows. It also minimizes to notification area. Hover mouse over status icon in notification area and you will get session information.
PythoPhotoPod is a Python-based GTK+ GUI for Linux synchronizing photos and photo albums with your iPod Photo (tm) (also known as iPod with a color display), iPod Video (tm) or iPod Nano (tm).
SDB is an utility for traders to manage a collection of live shows. It currently features various export formats (txt, html, php, xml) and a gui to browse, add, edit your shows.
xbgtk - an xbase/Harbour/xHarbour object-oriented wrapper for using the GTK+ GUI. This project has been deprecated in favour of https://github.com/tuffnatty/hbgi, an approach that uses GObject Introspection for automatic bindings.