For an overview and a list of resources available for ENDZONE click here.
For the rules for ENDZONE Football click here.
For the rules for ENDZONE Juniorball (similar to Ultimate Frisbee) click here.
More information on Flag Football is available in this document from the International Federation of American Football - click here.
If you are interested in the positioning of Flag and ENDZONE there are some details here.
The video below gives an introduction to ENDZONE.