Daux Documentation Manager
Daux does one thing and one thing well: managing documentation. The help files you are viewing right now are built using Daux.
GreenAnt provides a simple Daux hosting solution with integrated web-based editor. This means that not only do you have access to the Daux software but your site is automatically generated and you can edit it without ever leaving your web-browser.
More information on how Daux works can be found here