Whitebeam is a complete rapid development Web application server integrating Apache, Posgresql, Mozilla's SpiderMonkey JavaScript engine with it's own powerful XML/XPath based secure application framework.
VDMPad is a simple Web IDE server for VDM-SL based upon VDMJ and Squeak Smalltalk.
You can launch a VDMPad Server on your Mac or Linux PC and open "http://localhost:8085" with your browser.
Although VDM does NOT run on Windows platforms, you can use Windows/iOS/Android devices to open VDMPad running on Mac or Linux server.
Xemeiah is a fast, modular and scalable XML Framework written in C++, with an efficient DOM and Oasis-compliant XSLT Processor. Xemeiah modules include a persistence layer, a fast Ajax Web Server, a Media Player, ImageMagick frontend, java bindings...
Smith is an open source, cross-platform ColdFusion® engine, written entirely in Java. Running on top of Java Runtime Environment and Java Servlet Container, it can be deployed virtually on any operating system and work with any web server.
Snurt is a programming environment and platform for the web. Use it to write and run simple or complex web applications using only a browser. Snurt programs are written in JavaScript using Mozilla Rhino. Snurt is written in JSP (Java Server Pages).
PyREXX is a interprocess messaging server for routing remote prodecure calls using xml-based messages (Jabber, XML-RPC, etc), which will allow programs to interact more easily.