Mereo is a simple and small HTTP server, designed to run on all Windows platforms.
The documentation can be found in the installer package.
Download the latest stable version.
If you want to show your appreciation by means of a micro-donation using Flattr, it is certainly welcome.
The source code can be viewed online or checked out from https://mereo.svn.sourceforge.net/svnroot/mereo/trunk/.

Screenshot updated at June 14, 2010.