Implements the Java Servlet API and JavaServer Pages
The ServletExec product line consists of five deployment versions - depending on your web server, operating system, and process configuration. All versions of the ServletExec product line share a common set of features.

Shipping since December 1997, ServletExec is one of the most mature, robust, and best performing implementations of the servlet and JSP specifications available. ServletExec has historically been one of the first products to implement new versions of the servlet and JSP specifications.
Out-Of-Process application server configuration

* web server adapters for:
o Microsoft IIS
o Apache HTTP Server
o Sun Java System Web Server (SJSWS)
o Sun ONE Web Server
* supports multiple Java VMs per web server
* deployable on a different physical machine from the web server
New Features:

* Unified Expression Language
* Pluggable API for Resolving Variable References
* Deferred Expressions you can free download ServletExec 6.0 now.