Dabo is the easy to use, cross-platform, 3-tier, open source desktop database development framework.

Ed and Paul announce their work on Dabo, a runtime framework for creating 3-tier desktop apps that will run on all versions of Windows, Linux, and Macintosh OSX. Written in Python, and abstracting the wxPython GUI toolkit, it is written with ease of use, power, and flexibility in mind. We've worked to create a development environment where the commonly-needed things are easy to implement, and the rarely-needed things are still doable.