http://abhinavsingh.com/blog/2008/12/php-extensions-how-and-why/

Vork is an open-source PHP framework designed for rapid development of performance-oriented scalable applications.

The mission of Vork is to provide an MVC architecture with a full-featured toolkit and universal database support without adding overhead, creating slow & unscalable abstraction layers or re-inventing native PHP functionality.

http://www.vork.us/

http://devzone.zend.com/article/12132-Getting-Started-with-MongoDB-and-P...

php-activerecord is an open source ORM library based on the ActiveRecord pattern. It aims to massively simplify the interactions with your database and eliminate the chore of hand written SQL for common operations. Unlike other ORMs, you do not need to use any code generators nor maintain mapping files for your tables. This library was inspired by Ruby on Rails' implementation and therefore borrows many of its conventions and ideas. The best place to get started is by checking out the Guides below!

http://hadoop.apache.org/

http://en.wikipedia.org/wiki/Behavior_Driven_Development

http://www.alfajango.com/blog/performance-tuning-for-phusion-passenger-a...

http://www.slideshare.net/napcs/rails-and-legacy-databases-railsconf-200...

http://javascriptmvc.com/

http://www.artima.com/scalazine/articles/twitter_on_scala.html