O'Reilly Media book: Jump Start Sinatra

Jump Start Sinatra:
This short SitePoint book provides readers with a fun and yet practical introduction to Sinatra, a framework that makes web development with Ruby extremely simple. It's not intended to be a completely comprehensive guide to the framework or an in-depth Ruby tutorial, but will quickly get you up to speed with Sinatra and give you the confidence to start experimenting on your own.

The book is built around a real-life example project: a content management system. It's a fun and easily understandable project that is used to demonstrate the concepts outlined in the book in a practical way.

This is a clear, approachable and very easy-to-follow book that will get you to to speed with Sinatra in no time.

Perl's Dancer is a port of Ruby's Sinatra

Joel Berger's blog

Interesting!

"Lamer news" is a Ruby/Sinatra/Redis/jQuery application created to run the lamer news website, but is free to fork

antirez/lamernews - GitHub

Quickly run Sinatra apps using JRuby : RubyFlow

Quickly run Sinatra apps using JRuby : RubyFlow

O'Reilly Media book: Sinatra: Up and Running

Sinatra: Up and Running:

Take advantage of Sinatra, the Ruby-based web application library and domain-specific language used by GitHub, LinkedIn, Engine Yard, and other prominent organizations. With this concise book, you will quickly gain working knowledge of Sinatra and its minimalist approach to building both standalone and modular web applications.