XML/XSL enterprise platform and A/SQL application server from Promind Systems.

XML Application Server for Apache. Provides on-the-fly conversion from XML to any format, such as HTML, WAP or text using either W3C standard techniques, or custom code. AxKit also uses a built-in Perl interpreter to provide for XML transformation.

Web server/application server which allows for tag handlers similar to ColdFusion. Branched from Roxen Webserver.

Java-based application server with XML features, licensed under BSD-like license

Servlet API 2.1 servlet container. It provides HTTP/1.1 compliance and has an easy to use admin interface. [Open Source, GPL]

A Perl-based application server modeled after Zope. Still in the early phases of development.

Distributed platform compliant with the EJB specifications [MPL-like license]

XML/XSLT processor utilizing Apache and mod_python.

a tool for creating, modifying and maintaining dynamic database-enabled web services. [Free, Open Source, GPL]

An open source application server written in php.

XML-compliant templating solution for PHP

Sue Spielman looks at JSP and XSP to help you decide which is right for your development needs.

Open Source Enterprise Java Beans (EJB) Container System and Server. [BSD-style license]

Java-based framework for portal applications, providing API's and ready-to-use tools for pages, portlets, user management, content management, collaboration and community services. (LGPL)

OpenThought is a Web application engine. Designed to create pages that communicate with web server from DHTML using XML to update portions of page rather than requiring entire page reloads.

PHP-based project geared toward creating web-development environment for non-programmers. Plans to allow web-interface to predefined modules for forums, yellow pages, and news.

Java-based application server that allows for definition of custom tags, developed by a research group at Ricoh. Currently developing an Office Forms system, a shared Calendar, and a browser-independent bookmark and history manager.

Web server & application server which includes support for RXML, a tag-based language for constructing dynamic content. Allows tag plugins to be written in Pike.

An open source, easily extensible, high performance application server, written in Python.

Open-source Web application server environment in which Web-database applications can be developed completely in an extended HTML language. Similar to ColdFusion.

With little or no marketing budget, open-source software is finding its way into the back offices of the largest companies and is powering some of the highest-bandwidth Web sites on the Internet.

Provides a J2EE compliant runtime environment for both server and mobile platforms, such as J2ME, MIDP or other CLDC based devices (e.g. runs on the PersonalJava enabled Sharp Zaurus and Compaq's iPAQ).

Application server written in the Key programming language. Includes source, documentation, downloads, and mailing list. [Open Source, LGPL]

A suite of software components for developing object-oriented, web-based applications. [Open Source, Python license]

An open-source project which provides a complete development environment for web applications using only XML and JavaScript.