TWIT is a tiny webserver written in Java, which aims to be portable and small enough to easily be integrated into any development project. It supports HTTP/1.0 and CGI/1.1, HTTP/1.1 and Java Servlet support are in the works.
The Nogis Webserver is a small server with PHP and CGI support. It is very portable and we are aiming to make it in a Class structre for others to use.