Offers a directory of categorized plugins with the possibility to vote and comment on each one of them.

Dave Thomas, Mike Clark, David Heinemeier Hansson, Leon Breedt, Thomas Fuchs, Andrea Schwarz; Pragmatic Bookshelf, 2006, ISBN 0977616630. Thorough guide, from Agile Programming perspective.

Information portal for developers. Provides news, tutorials on the framework and its related subjects.

For clients developing critical Rails apps, who don't want to handle deployment, or hiring IT staff to manage servers, and want Rails-based 24/7 operation support on reliable infrastructure, and scaling from 10 to 1, 000, 000 users. Folsom, California...

Ruby on Rails consultancy; by part owner of Err the Weblog.

Provides products for instrumenting, monitoring and managing applications performance.

Provides several articles and tutorials about the framework and the language.

Links to RoR scripts, programs, tutorials, books, websites.

Offers a solution to deploy and host rails applications with git.

Provides a tool that's tracking applications errors.