have a look at
this post.
I'm not familiar with iPlanet, but if (after reading my link) you're looking for a web
server, then
apache is my suggestion.
If you're looking for a web container (jsp/servlets), then
tomcat or
jetty notice that jetty is a
HTTP servlet server (so it's a web server + web container). The same with tomcat.
Jetty is a 100% Java HTTP Server and Servlet Container. This means that you do not need to configure and run a seperate web server (like Apache) in order to use java, servlets and JSPs to generate dynamic content. Jetty is a fully featured web server for static and dynamic content. Unlike separate server/container solutions, this means that your web server and web application run in the same process, without interconnection overheads and complications.
let me know if I confused you more
[ August 26, 2003: Message edited by: Andres Gonzalez ]