Example GNOME app w/ docs?

[Dan Mueth <d-mueth uchicago edu>]

> Perhaps we should have (1) a simple template with just the basic tags
> which people use most, and then (2) a more complete GDP reference document
> which lists the proper markups, nomenclature, etc.

Does anybody know if there is a full, simple example application ("Hello
World") that shows the basics of writing a GNOME app and documentation?
If not, perhaps this would be a nice way of illustrating the basics of how
GNOME apps and documentation should be layed out, how the Help button
connects, how context sensitive help works(when this is finished), etc. 

Do we need something like this that would act as a simple example for both
new GNOME developers and documentation authors?  Or does this exist
somewhere?

Dan