Webistrano is a Web UI for managing Capistrano deployments. It lets you manage projects and their stages like test, production, and staging with different settings. Those stages can then be deployed with Capistrano through Webistrano.
Webistrano's purpose is to make the deployment of multi-stage and multi-environment scenarios easy. Further it allows you to track who deployed what when to which servers and be alerted by email on each deployment.
Webistrano itself is a Ruby on Rails application that includes an edge version of Rails and all needed dependencies like Capistrano or Net::SSH. The only required dependencies are Ruby, Rake, and a database.