We have used Eclipes as development environment. The quality by which the platform supports the workflow of the developer was always a (naturally unrivaled) model for our product.
A small and obviously sparsely known tool is the Helpsetmaker of the cantamen GmbH. It helped us magnificently to develop Hepset and its documentation.
With the two free tools in combination we are able to offer the technically unexperienced user with Windows a totally quick installation and start performance according to the general standard.