My colleagues and friends who develop the Catalyst Web Tools here at the UW have done an open source release of their Solstice framework. Solstice is a web app development framework for perl developers. It’s what the Catalyst folks use to develop tools that we use heavily, including the highly regarded (and recent award-winning) WebQ quizzing and survey tool.
Solstice is a model-view-controller framework (as is Ruby on Rails) that can make it easier for perl developers to build robust, maintainable, and highly functional web applications.
Next up the Catalyst team is working on open sourcing the web tools code, which should be widely useful as both apps to use as-is and as starting points for how to develop and extend Solstice applications.