Google App Engine Launcher is written in Python, uses wxPython for its GUI environment, and help you creating, running, and deploying App Engine applications when developing on Windows & Linux. Google’ve now open sourced the Windows launcher so that developers can use it on other platforms. Also, also started the process of open sourcing the Mac version of the launcher. The goal of the launcher’s to help make App Engine development quick and easy. There may be other tasks you'd like to integrate (e.g. run tests, re-encode images before deploying, etc) and with the launcher now open sourced, you can add them! You can download open source code for the App Engine Launcher: for Windows and Linux, and for Mac OS X.