Application Servers for Ruby

Webrick

Default web server, distributed with ruby

webrick.org

Mongrel

github.com/fauna/mongrel/

Mongrel 2

mongrel2.org

Phusion Passenger™

Phusion Passenger™ aka mod_rails. Features: zero maintenance.

modrails.com

Unicorn

I like Unicorn because it's Unix

unicorn.bogomips.org

Thin

code.macournoyer.com/thin

WebROaR

webroar.in

ControlTower

Server writed on MacRuby http://svn.macosforge.org/repository/ruby/ControlTower/

Rainbows

rainbows.rubyforge.org

Goliath

github.com/postrank-labs/goliath