Credits
MapClient is completely based on Open Source components:
and developed completely in an Open Source environment:
Some Open Source components of MapServer are:
And it even works under MS-Windows.
It is impossible to give credit to everyone working on these projects;
even the list of those who answered my questions would be very long.
However, I would like
to thank in particular all the developers of MapServer, especially
Daniel Morissette, Frank Warmerdam and (of course) Steve Lime.
They not only produced the best WebMapping application in existence, but also
made it available to the world, both technologically (the code is
smart, very readable and unbelievably expandable),
and humanely, by actively supporting users
and developers over very long periods of time.