Hobo – Open Source Extension to Ruby on Rails
http://www.hobocentral.net/

Hobo is an Open Source extension to Ruby on Rails which helps you build full blown web applications incredibly quickly and easily. Available as a Gem or Rails plugin, Hobo provides a simple, clean and elegant development framework which allows for rapid prototyping or production of the most sophisticated web applications. Main Features include: a) Rapid implementation of dynamic Ajax interfaces in your application with no extra programming, b) Switchable themes. Customise and tweak your application structure and layout to meet any design goals, and c) Powerful mark-up language, DRYML, combines rapid development with ultimate design flexibility. The end of the cookie cutter blues! This has been added to World Wide Web Reference Subject Tracer™ Information Blog.