Camping, like Rails and Waves is a web framework for Ruby.

Waves is a web framework for Ruby designed to move beyond the popular Rails framework.

From Google’s website: “Spring-On-Rails is a rapid Java Enterprise Application development Framework; It is a far distance cusin of Ruby-on-Rails. Spring-On-Rails is design to help developer to generate basic skelton of database CRUD type applications. Generated application is based upon SpringFramework, Ibatis and Hibernate for Java in middle tier.”

This is a by no means exhaustive or representative list, taken from Wikipedia. Basecamp – online project management BBC Programme Catalogue – video and audio archives from BBC television and radio ChaCha.com – a human-powered search engine Justin.tv – A live video streaming platform OpenCongress – Aggregated news and official data about the US Congress Penny Arcade – gamer-humor webcomic Revolution Health – a health portal Twitter – micro-blogging servi