WingNut is a platform independent template engine, abstracting gui design and high level application interaction from the "guts" of development. WingNut Renderers are available for Java and Perl, although it is natively a Servlet technology.
The Cyrano Template Management System is a system to manage a complete website with a few of XML-files for configuration and template files to specify it's design. To include the system into the site it use Apache-Server-Site-Includes.
HTML::DWT is a series of Perl 5 modules designed to allow for the use of Dreamweaver (A web design tool from Macromedia) Templates and Libraries in CGI and web applications. Currently supports Dreamweaver 3.
...Easily takes care of the following, News, an Active Roster, a Link Manager, Scheduled Matches, Match Records, Personal Bio pages. Template based (works on any existing site design) and much more!!!
perl WebMVC is a mod_perl web application framework designed around the Model View Controller design pattern. It is written in perl with an XML configuration component.
Hayta-UML is a Web2.0 UML tool, that allows users to draw UML diagrams. A core design decision is to have a native version-control inside the application.