BlackAdder

From theKompany.com:

BlackAdder is an application development environment that allows professional and hobbyist programmers alike to produce complex applications for the Windows and Linux platforms.

BlackAdder brings together the Python programming language, the Qt graphical user interface (GUI) toolkit, ODBC database connectivity and an Integrated Development Environment (IDE) that includes an editor, a GUI designer, a debugger and an interactive Python interpreter. BlackAdder gives the programmer, in a single package, all they need to develop sophisticated applications.

Key Features:
A complete cross-platform Integrated Development Environment for developing GUI applications in Python. You don't need anything else.

Applications run unchanged under Windows and Linux. Protect your investment in your development.

Personal and Business Editions. The Business Edition includes optional support and the rights to distribute the run-time elements with your application at no extra charge.

A limited functionality, freely available demonstration version can be downloaded from here.

Detailed Features:
Organizes your Python scripts and GUI designs into easy to manage projects.

An editor that includes highlighting of Python keywords, automatic indentation, and user configurable fonts and colors.

An interactive Python interpreter (v2.x) that allows you to execute any Python commands while your application is running.

The Professional version of the Qt GUI toolkit (v3.x) including: the Canvas module

the Table module

the Database module

Qsocket, QserverSocket, and Qhost Address classes from the Network module.

A GUI designer with all the features of Qt Designer and generates Python code.

A debugger that supports single stepping and breakpoints and the display of local and global objects in any active Python frame.

ODBC database connectivity (using mxODBC v2.0, see http://www.egenix.com/files/python/mxODBC.html).

10mb of PyQt documentation with lots of examples and two tutorials, this is also available as a stand alone product called PyQtDoc.

All that in a fully integrated IDE environment.

Personal Edition Features
For home use.

Includes Windows and Linux versions.

Optional subscription service to receive updates.

Informal mailing list support.

Business Edition Features
For commercial use.

Includes Windows and Linux versions.

Optional subscription service to receive updates.

Optional formal email support.

Includes the rights to distribute the run-time elements (except mxODBC) with your application.