1) Apache :- Apache is the most populer web server. An open-source HTTP server for modern operating systems including UNIX and Windows. Download url:- http://httpd.apache.org/
2) NetScape :- Netscape Web Publisher is a Java applet that runs on your local desktop and interacts with files managed by a Netscape Enterprise Server. With Web Publisher, you can directly access, edit, and manage documents stored on remote servers. download URL:- http://www.sun.com/download/products.xml?id=3f4f998d
3) Tomcat :- Apache Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. Apache Tomcat powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations.
Download url:- http://archive.apache.org/
4) IIS :- Internet Information Services (IIS) is a powerful Web server that provides a highly reliable, manageable, and scalable Web application infrastructure for all versions of Windows Server.
Download url:- http://www.microsoft.com/technet/downloads/default.mspx
5) Sun-java-webserver :- Sun Java System Web Server (formerly Sun ONE Web Server) is a secure, reliable, easy-to-use Web server designed for medium and large business applications.
Download url:- http://www.sun.com/software/products/web_srvr/home_web_srvr.xml