Servlets are a Java API that can be used to replace Perl CGI scripts, or more specifically, to extend the capabilities of the web server.

Servlets can also be used with XML and XSL.

• API
  • Sun's Servlet API
  • Sun's Java Server Pages White Paper
    Java Server Pages are a method to ease design and maintenance of web pages. Similar to Active Server Pages by Microsoft.
• Servlet Information
  • Purple Servlet FAQ
    A comprehensive source of information for Servlets.
• Servlet Engines
  • Java Web Server
    This was the reference implementation of the servlet engine implemented in Java. Sun has turned over the source code to the Apache Project and is now implemented as Tomcat.
  • Tomcat (Jakarta Project)
    The reference implementation of Java Servlets and Java Server Pages. The code is not yet available aside from a nightly standalone build.
  • Apache JServ
    A 100% Pure Java implementation of the Servlet 2.0 API specification. Works with Apache.
  • ServletExec
    A high-performance commercial servlet engine. Offers a free demo/development copy and a servlet debugger. Works with most web servers.
  • JRun
    A high-performance commercial servlet engine. Offers a free demo/development copy. JavaWorld's Best Servlet Tool for 1998 and WebTechnique's Best Java Tool for 1998. Recently acquired by Allaire. Works with most web servers.