Jigsaw is as you can find on their professional, well-documented webpage http://www.w3.org/jigsaw/, a java-based webserver. I originally was looking for an easy-to-use server to install on my dont-touch-when-it-is-running Windows 95 for programming webpages using PHP. After having taken into account nearly any popular, wellknown servers, I finally found Jigsaw.
It is not even as complicated to install, as the name Jigsaw is to type with my left hand on the keyboard!
Enjoy!

The installation of Jigsaw 2.1.1 is quite simple, although you act not the way, you are used to install applications on Windows 95/98. Take a decision, where to move the Jigsaw folder. I propose:
c:\jigsaw

Install the Java SDK to:
c:\java\jdk\
c:\java\jre\

Then follow the README installation provided by the Jigsaw distribution. If you like, you can download two batch-files I modified, which can be executed anywhere to run your client or server application.
client.bat
server.bat

Running the client batchfile should produce an output similar to the shown screenshot.
Running the server batchfile should produce an output similar to the shown screenshot.

By then, Jigsaw webserver is ready to run. By typing the clients address http://gehrig:8001/ into the browser, the Jigsaw webserver manual overview will appear. Read it! It is really well written.

The server admin can be run with the batch file mentioned before. A GUI in Java-look appears. Login for the first time with admin, password admin. Now we are ready to configure the server for PHP!

All the fuss about webservers has been new to me. I found very helpful information on the following site: