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Credits

MapClient is completely based on Open Source components:

- Operating Systems: Linux, Beowulf
- WebServer: Apache
- Database: PostgreSQL, PostGIS
- Browser: Mozilla
- Languages: JavaScript, PHP

and developed completely in an Open Source environment:

- Operating System: SUSE Linux and Cygwin
- Desktop: XFree86 and WindowMaker
- Tools: GNU compilers and utilities, Perl, Python, Gimp, Vim

Some Open Source components of MapServer are:

- Graphics: GD and FreeType
- GIS Vector and Raster Formats: OGR, GDAL, GeoTiff
- Raster GIS: GRASS
- Projections: Proj

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.