Easiest Installable Web Server

On EasiestInstallableWikiContest for hosted Web servers the question is:

Where to find the easiest installable Web server. Which is it?

Unix

• fnord (see http://www.fefe.de/fnord/)
• boa (see http://www.boa.org)
• ApacheHttpd?

Windows

• Abyss Web Server
• TinyWeb? (http://delphi.icm.edu.pl/ftp/d20free/tinyweb2.htm)

Anything

• PythonServerPlus