Life In 19x19

Is there any (ideally easy/free) software for generating interactive demos and problems, like the ones at http://www.goproblems.com/ and http://playgo.to/interactive/P50K.html ?

Or is there a tutorial anywhere how to do it?

I'm going to be teaching a couple of beginner groups this summer on the library's Smart Board, and want to make my own introductory tutorial.

is my reply too late...?
hahaha...
well, i think that 2 source is enough to teach begginer
i also learn how to play from playgo.to
if u want u, can also take some tsumego from tsumego.tasuki.org